/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 11:57:43,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 11:57:43,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 11:57:43,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 11:57:43,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 11:57:43,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 11:57:43,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 11:57:43,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 11:57:43,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 11:57:43,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 11:57:43,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 11:57:43,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 11:57:43,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 11:57:43,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 11:57:43,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 11:57:43,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 11:57:43,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 11:57:43,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 11:57:43,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 11:57:43,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 11:57:43,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 11:57:43,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 11:57:43,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 11:57:43,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 11:57:43,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 11:57:43,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 11:57:43,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 11:57:43,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 11:57:43,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 11:57:43,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 11:57:43,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 11:57:43,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 11:57:43,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 11:57:43,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 11:57:43,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 11:57:43,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 11:57:43,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 11:57:43,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 11:57:43,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 11:57:43,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 11:57:43,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 11:57:43,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 11:57:43,556 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 11:57:43,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 11:57:43,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 11:57:43,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 11:57:43,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 11:57:43,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 11:57:43,558 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 11:57:43,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 11:57:43,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 11:57:43,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 11:57:43,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 11:57:43,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 11:57:43,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 11:57:43,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 11:57:43,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 11:57:43,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 11:57:43,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 11:57:43,559 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 11:57:43,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 11:57:43,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 11:57:43,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 11:57:43,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 11:57:43,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 11:57:43,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:57:43,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 11:57:43,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 11:57:43,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 11:57:43,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 11:57:43,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 11:57:43,560 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 11:57:43,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 11:57:43,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 11:57:43,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 11:57:43,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 11:57:43,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 11:57:43,834 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 11:57:43,835 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 11:57:43,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2021-08-21 11:57:43,836 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2021-08-21 11:57:44,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 11:57:44,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 11:57:44,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 11:57:44,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 11:57:44,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 11:57:44,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 11:57:44,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 11:57:44,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 11:57:44,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 11:57:44,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 11:57:44,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 11:57:44,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 11:57:44,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 11:57:44,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/1) ... [2021-08-21 11:57:44,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:57:44,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:44,170 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 11:57:44,182 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 11:57:44,199 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 11:57:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 11:57:44,199 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 11:57:44,199 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 11:57:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 11:57:44,200 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 11:57:44,200 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 11:57:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 11:57:44,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 11:57:44,201 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 11:57:44,339 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 11:57:44,339 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 11:57:44,340 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:57:44 BoogieIcfgContainer [2021-08-21 11:57:44,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 11:57:44,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 11:57:44,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 11:57:44,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 11:57:44,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:44" (1/2) ... [2021-08-21 11:57:44,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1d2a65 and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:57:44, skipping insertion in model container [2021-08-21 11:57:44,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:57:44" (2/2) ... [2021-08-21 11:57:44,345 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2021-08-21 11:57:44,348 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 11:57:44,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 11:57:44,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 11:57:44,349 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 11:57:44,387 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 11:57:44,415 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 11:57:44,419 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 11:57:44,420 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 11:57:44,443 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 26 transitions, 68 flow [2021-08-21 11:57:44,459 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 11:57:44,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:44,467 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:44,467 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:44,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:44,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1644387332, now seen corresponding path program 1 times [2021-08-21 11:57:44,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:44,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202072718] [2021-08-21 11:57:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:44,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:44,629 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 11:57:44,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:44,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202072718] [2021-08-21 11:57:44,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202072718] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:44,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:44,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 11:57:44,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200937273] [2021-08-21 11:57:44,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 11:57:44,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 11:57:44,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:57:44,663 INFO L87 Difference]: Start difference. First operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:44,690 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2021-08-21 11:57:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 11:57:44,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 11:57:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:44,701 INFO L225 Difference]: With dead ends: 99 [2021-08-21 11:57:44,701 INFO L226 Difference]: Without dead ends: 92 [2021-08-21 11:57:44,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:57:44,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-21 11:57:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-08-21 11:57:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 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 11:57:44,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-08-21 11:57:44,743 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 12 [2021-08-21 11:57:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:44,744 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-08-21 11:57:44,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-08-21 11:57:44,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:57:44,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:44,746 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:44,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 11:57:44,747 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:44,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash 27040755, now seen corresponding path program 1 times [2021-08-21 11:57:44,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:44,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52745109] [2021-08-21 11:57:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:44,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:44,854 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 11:57:44,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:44,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52745109] [2021-08-21 11:57:44,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52745109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:44,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584568180] [2021-08-21 11:57:44,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:44,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:44,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:44,861 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 11:57:44,862 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 11:57:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:44,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 11:57:44,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:45,013 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 11:57:45,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584568180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:45,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:45,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-21 11:57:45,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668596140] [2021-08-21 11:57:45,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:45,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:45,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:45,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:45,015 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 11:57:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:45,117 INFO L93 Difference]: Finished difference Result 189 states and 379 transitions. [2021-08-21 11:57:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:45,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 15 [2021-08-21 11:57:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:45,120 INFO L225 Difference]: With dead ends: 189 [2021-08-21 11:57:45,120 INFO L226 Difference]: Without dead ends: 189 [2021-08-21 11:57:45,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-21 11:57:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 101. [2021-08-21 11:57:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.13) internal successors, (213), 100 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 213 transitions. [2021-08-21 11:57:45,138 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 213 transitions. Word has length 15 [2021-08-21 11:57:45,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:45,139 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 213 transitions. [2021-08-21 11:57:45,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 11:57:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 213 transitions. [2021-08-21 11:57:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 11:57:45,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:45,143 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:45,161 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 11:57:45,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:45,344 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash 704095387, now seen corresponding path program 2 times [2021-08-21 11:57:45,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:45,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964253330] [2021-08-21 11:57:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:45,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:45,427 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 11:57:45,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:45,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964253330] [2021-08-21 11:57:45,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964253330] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:45,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:45,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 11:57:45,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417831873] [2021-08-21 11:57:45,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 11:57:45,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 11:57:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 11:57:45,429 INFO L87 Difference]: Start difference. First operand 101 states and 213 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:45,463 INFO L93 Difference]: Finished difference Result 120 states and 245 transitions. [2021-08-21 11:57:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:45,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 11:57:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:45,464 INFO L225 Difference]: With dead ends: 120 [2021-08-21 11:57:45,464 INFO L226 Difference]: Without dead ends: 113 [2021-08-21 11:57:45,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:45,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-21 11:57:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2021-08-21 11:57:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 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 11:57:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-08-21 11:57:45,471 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 15 [2021-08-21 11:57:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:45,471 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-08-21 11:57:45,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-08-21 11:57:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:57:45,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:45,472 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:45,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 11:57:45,472 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash -583322209, now seen corresponding path program 1 times [2021-08-21 11:57:45,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:45,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514900319] [2021-08-21 11:57:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:45,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:45,656 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 11:57:45,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:45,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514900319] [2021-08-21 11:57:45,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514900319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:45,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710761209] [2021-08-21 11:57:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:45,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:45,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:45,668 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 11:57:45,668 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 11:57:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:45,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:57:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:45,889 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 11:57:45,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710761209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:45,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:45,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 11:57:45,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140443060] [2021-08-21 11:57:45,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:57:45,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:45,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:57:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:57:45,892 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:46,105 INFO L93 Difference]: Finished difference Result 174 states and 366 transitions. [2021-08-21 11:57:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:57:46,106 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:57:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:46,108 INFO L225 Difference]: With dead ends: 174 [2021-08-21 11:57:46,108 INFO L226 Difference]: Without dead ends: 153 [2021-08-21 11:57:46,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:57:46,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-21 11:57:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2021-08-21 11:57:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1652173913043478) internal successors, (249), 115 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 249 transitions. [2021-08-21 11:57:46,121 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 249 transitions. Word has length 19 [2021-08-21 11:57:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:46,121 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 249 transitions. [2021-08-21 11:57:46,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 249 transitions. [2021-08-21 11:57:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 11:57:46,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:46,122 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:46,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:46,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 11:57:46,337 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:46,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:46,338 INFO L82 PathProgramCache]: Analyzing trace with hash 304723312, now seen corresponding path program 1 times [2021-08-21 11:57:46,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:46,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944418919] [2021-08-21 11:57:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:46,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:46,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:46,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944418919] [2021-08-21 11:57:46,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944418919] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:46,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:46,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 11:57:46,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463910474] [2021-08-21 11:57:46,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:46,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:46,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:46,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:46,387 INFO L87 Difference]: Start difference. First operand 116 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:46,411 INFO L93 Difference]: Finished difference Result 139 states and 299 transitions. [2021-08-21 11:57:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:46,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 11:57:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:46,412 INFO L225 Difference]: With dead ends: 139 [2021-08-21 11:57:46,412 INFO L226 Difference]: Without dead ends: 139 [2021-08-21 11:57:46,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-21 11:57:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2021-08-21 11:57:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1610169491525424) internal successors, (255), 118 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 255 transitions. [2021-08-21 11:57:46,430 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 255 transitions. Word has length 19 [2021-08-21 11:57:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:46,430 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 255 transitions. [2021-08-21 11:57:46,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 255 transitions. [2021-08-21 11:57:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 11:57:46,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:46,432 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:46,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 11:57:46,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:46,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:46,432 INFO L82 PathProgramCache]: Analyzing trace with hash 542300154, now seen corresponding path program 2 times [2021-08-21 11:57:46,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:46,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436960465] [2021-08-21 11:57:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:46,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:46,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:46,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436960465] [2021-08-21 11:57:46,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436960465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:46,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386681025] [2021-08-21 11:57:46,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:57:46,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:46,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:46,495 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 11:57:46,496 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 11:57:46,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:46,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:46,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 11:57:46,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:46,617 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 11:57:46,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386681025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:46,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:46,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 11:57:46,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403807699] [2021-08-21 11:57:46,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:46,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:46,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:46,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:46,618 INFO L87 Difference]: Start difference. First operand 119 states and 255 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:46,687 INFO L93 Difference]: Finished difference Result 323 states and 674 transitions. [2021-08-21 11:57:46,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:57:46,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 11:57:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:46,689 INFO L225 Difference]: With dead ends: 323 [2021-08-21 11:57:46,689 INFO L226 Difference]: Without dead ends: 323 [2021-08-21 11:57:46,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:57:46,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-08-21 11:57:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 214. [2021-08-21 11:57:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2816901408450705) internal successors, (486), 213 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 486 transitions. [2021-08-21 11:57:46,696 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 486 transitions. Word has length 22 [2021-08-21 11:57:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:46,697 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 486 transitions. [2021-08-21 11:57:46,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 486 transitions. [2021-08-21 11:57:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 11:57:46,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:46,698 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 11:57:46,718 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 11:57:46,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:46,915 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:46,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:46,916 INFO L82 PathProgramCache]: Analyzing trace with hash -560508981, now seen corresponding path program 1 times [2021-08-21 11:57:46,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:46,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330974175] [2021-08-21 11:57:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:46,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:47,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:47,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330974175] [2021-08-21 11:57:47,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330974175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:47,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157751598] [2021-08-21 11:57:47,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:47,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:47,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:47,092 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 11:57:47,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 11:57:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:57:47,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:47,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157751598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:47,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:47,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-21 11:57:47,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261406491] [2021-08-21 11:57:47,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:57:47,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:47,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:57:47,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:57:47,425 INFO L87 Difference]: Start difference. First operand 214 states and 486 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:47,685 INFO L93 Difference]: Finished difference Result 526 states and 1173 transitions. [2021-08-21 11:57:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 11:57:47,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 11:57:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:47,688 INFO L225 Difference]: With dead ends: 526 [2021-08-21 11:57:47,688 INFO L226 Difference]: Without dead ends: 519 [2021-08-21 11:57:47,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:57:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-08-21 11:57:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 379. [2021-08-21 11:57:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.3412698412698414) internal successors, (885), 378 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 885 transitions. [2021-08-21 11:57:47,697 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 885 transitions. Word has length 22 [2021-08-21 11:57:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:47,697 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 885 transitions. [2021-08-21 11:57:47,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,698 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 885 transitions. [2021-08-21 11:57:47,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 11:57:47,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:47,699 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 11:57:47,715 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 11:57:47,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:47,913 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash 700260299, now seen corresponding path program 2 times [2021-08-21 11:57:47,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:47,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187972211] [2021-08-21 11:57:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:47,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:48,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:48,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187972211] [2021-08-21 11:57:48,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187972211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:48,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967201175] [2021-08-21 11:57:48,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:57:48,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:48,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:48,066 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 11:57:48,076 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 11:57:48,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:48,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:57:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:48,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967201175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:48,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:48,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-21 11:57:48,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786280425] [2021-08-21 11:57:48,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:57:48,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:48,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:57:48,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:57:48,397 INFO L87 Difference]: Start difference. First operand 379 states and 885 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:48,664 INFO L93 Difference]: Finished difference Result 636 states and 1439 transitions. [2021-08-21 11:57:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:57:48,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 11:57:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:48,670 INFO L225 Difference]: With dead ends: 636 [2021-08-21 11:57:48,670 INFO L226 Difference]: Without dead ends: 629 [2021-08-21 11:57:48,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:57:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-08-21 11:57:48,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 503. [2021-08-21 11:57:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.364541832669323) internal successors, (1187), 502 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1187 transitions. [2021-08-21 11:57:48,682 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1187 transitions. Word has length 22 [2021-08-21 11:57:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:48,682 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1187 transitions. [2021-08-21 11:57:48,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1187 transitions. [2021-08-21 11:57:48,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 11:57:48,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:48,684 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 11:57:48,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-21 11:57:48,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:48,900 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash 380237771, now seen corresponding path program 3 times [2021-08-21 11:57:48,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:48,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525738200] [2021-08-21 11:57:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:48,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:49,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:49,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525738200] [2021-08-21 11:57:49,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525738200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:49,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268456216] [2021-08-21 11:57:49,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:57:49,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:49,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:49,062 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 11:57:49,069 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 11:57:49,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:57:49,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:49,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:57:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:57:49,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268456216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:49,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:49,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-21 11:57:49,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613102776] [2021-08-21 11:57:49,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:57:49,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:49,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:57:49,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:57:49,390 INFO L87 Difference]: Start difference. First operand 503 states and 1187 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:49,588 INFO L93 Difference]: Finished difference Result 772 states and 1773 transitions. [2021-08-21 11:57:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:57:49,589 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 11:57:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:49,592 INFO L225 Difference]: With dead ends: 772 [2021-08-21 11:57:49,592 INFO L226 Difference]: Without dead ends: 758 [2021-08-21 11:57:49,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:57:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-08-21 11:57:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 650. [2021-08-21 11:57:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.391371340523883) internal successors, (1552), 649 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1552 transitions. [2021-08-21 11:57:49,607 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1552 transitions. Word has length 22 [2021-08-21 11:57:49,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:49,608 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1552 transitions. [2021-08-21 11:57:49,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:49,608 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1552 transitions. [2021-08-21 11:57:49,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 11:57:49,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:49,609 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 11:57:49,628 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 11:57:49,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:49,825 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash -567196879, now seen corresponding path program 4 times [2021-08-21 11:57:49,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:49,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107876885] [2021-08-21 11:57:49,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:49,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:49,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:49,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107876885] [2021-08-21 11:57:49,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107876885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:49,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681124865] [2021-08-21 11:57:49,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:57:49,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:49,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:49,997 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 11:57:49,998 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 11:57:50,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:57:50,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:50,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:57:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:50,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681124865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:50,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:50,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-21 11:57:50,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648371643] [2021-08-21 11:57:50,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:57:50,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:50,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:57:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:57:50,328 INFO L87 Difference]: Start difference. First operand 650 states and 1552 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:50,557 INFO L93 Difference]: Finished difference Result 760 states and 1794 transitions. [2021-08-21 11:57:50,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:57:50,557 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 11:57:50,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:50,560 INFO L225 Difference]: With dead ends: 760 [2021-08-21 11:57:50,560 INFO L226 Difference]: Without dead ends: 753 [2021-08-21 11:57:50,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:57:50,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-08-21 11:57:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 695. [2021-08-21 11:57:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.403458213256484) internal successors, (1668), 694 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1668 transitions. [2021-08-21 11:57:50,574 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1668 transitions. Word has length 22 [2021-08-21 11:57:50,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:50,575 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1668 transitions. [2021-08-21 11:57:50,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:50,575 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1668 transitions. [2021-08-21 11:57:50,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 11:57:50,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:50,576 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:50,599 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 11:57:50,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:50,804 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:50,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:50,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1627974969, now seen corresponding path program 5 times [2021-08-21 11:57:50,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:50,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637001743] [2021-08-21 11:57:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:50,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:50,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:50,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637001743] [2021-08-21 11:57:50,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637001743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:50,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100283189] [2021-08-21 11:57:50,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:57:50,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:50,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:50,941 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 11:57:50,975 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 11:57:51,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:57:51,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:51,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:57:51,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:51,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100283189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:51,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:51,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-21 11:57:51,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091727452] [2021-08-21 11:57:51,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:57:51,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:51,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:57:51,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:57:51,294 INFO L87 Difference]: Start difference. First operand 695 states and 1668 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:51,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:51,520 INFO L93 Difference]: Finished difference Result 812 states and 1925 transitions. [2021-08-21 11:57:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 11:57:51,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 11:57:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:51,523 INFO L225 Difference]: With dead ends: 812 [2021-08-21 11:57:51,523 INFO L226 Difference]: Without dead ends: 805 [2021-08-21 11:57:51,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:57:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-08-21 11:57:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 745. [2021-08-21 11:57:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.413978494623656) internal successors, (1796), 744 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1796 transitions. [2021-08-21 11:57:51,538 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1796 transitions. Word has length 22 [2021-08-21 11:57:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:51,538 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1796 transitions. [2021-08-21 11:57:51,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1796 transitions. [2021-08-21 11:57:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 11:57:51,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:51,540 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] [2021-08-21 11:57:51,560 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 11:57:51,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 11:57:51,753 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:51,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:51,753 INFO L82 PathProgramCache]: Analyzing trace with hash 463533599, now seen corresponding path program 6 times [2021-08-21 11:57:51,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:51,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620960227] [2021-08-21 11:57:51,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:51,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:51,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:51,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620960227] [2021-08-21 11:57:51,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620960227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:51,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753518836] [2021-08-21 11:57:51,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:57:51,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:51,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:51,907 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 11:57:51,919 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 11:57:52,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:57:52,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:52,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:57:52,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:52,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753518836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:52,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:52,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:57:52,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692223644] [2021-08-21 11:57:52,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:57:52,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:52,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:57:52,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:57:52,352 INFO L87 Difference]: Start difference. First operand 745 states and 1796 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:52,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:52,935 INFO L93 Difference]: Finished difference Result 1425 states and 3333 transitions. [2021-08-21 11:57:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:57:52,935 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 11:57:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:52,941 INFO L225 Difference]: With dead ends: 1425 [2021-08-21 11:57:52,941 INFO L226 Difference]: Without dead ends: 1411 [2021-08-21 11:57:52,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 417.8ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:57:52,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-08-21 11:57:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1030. [2021-08-21 11:57:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.445092322643343) internal successors, (2516), 1029 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2516 transitions. [2021-08-21 11:57:52,973 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2516 transitions. Word has length 25 [2021-08-21 11:57:52,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:52,973 INFO L470 AbstractCegarLoop]: Abstraction has 1030 states and 2516 transitions. [2021-08-21 11:57:52,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:52,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2516 transitions. [2021-08-21 11:57:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 11:57:52,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:52,976 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] [2021-08-21 11:57:53,006 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 11:57:53,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:53,193 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1307585132, now seen corresponding path program 7 times [2021-08-21 11:57:53,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:53,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537336635] [2021-08-21 11:57:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:53,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:53,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:53,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:53,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537336635] [2021-08-21 11:57:53,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537336635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:53,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173030509] [2021-08-21 11:57:53,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:57:53,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:53,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:53,241 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 11:57:53,245 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 11:57:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:53,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 11:57:53,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:57:53,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173030509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:53,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:53,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 11:57:53,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316001140] [2021-08-21 11:57:53,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:57:53,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:53,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:57:53,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:57:53,463 INFO L87 Difference]: Start difference. First operand 1030 states and 2516 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:53,521 INFO L93 Difference]: Finished difference Result 1306 states and 3010 transitions. [2021-08-21 11:57:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:57:53,522 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 11:57:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:53,526 INFO L225 Difference]: With dead ends: 1306 [2021-08-21 11:57:53,526 INFO L226 Difference]: Without dead ends: 1303 [2021-08-21 11:57:53,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:53,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-08-21 11:57:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1033. [2021-08-21 11:57:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.435077519379845) internal successors, (2513), 1032 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2513 transitions. [2021-08-21 11:57:53,547 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2513 transitions. Word has length 25 [2021-08-21 11:57:53,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:53,547 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 2513 transitions. [2021-08-21 11:57:53,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2513 transitions. [2021-08-21 11:57:53,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 11:57:53,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:53,549 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] [2021-08-21 11:57:53,568 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 11:57:53,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 11:57:53,763 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:53,763 INFO L82 PathProgramCache]: Analyzing trace with hash 823478032, now seen corresponding path program 8 times [2021-08-21 11:57:53,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:53,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351273889] [2021-08-21 11:57:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:53,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:53,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:53,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351273889] [2021-08-21 11:57:53,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351273889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:53,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136107397] [2021-08-21 11:57:53,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:57:53,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:53,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:53,791 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 11:57:53,833 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 11:57:54,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:54,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:54,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 11:57:54,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:57:54,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136107397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:54,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:54,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 11:57:54,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108747549] [2021-08-21 11:57:54,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:57:54,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:57:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:57:54,098 INFO L87 Difference]: Start difference. First operand 1033 states and 2513 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:54,150 INFO L93 Difference]: Finished difference Result 1948 states and 4632 transitions. [2021-08-21 11:57:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:57:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 11:57:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:54,157 INFO L225 Difference]: With dead ends: 1948 [2021-08-21 11:57:54,157 INFO L226 Difference]: Without dead ends: 1948 [2021-08-21 11:57:54,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:54,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-08-21 11:57:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1621. [2021-08-21 11:57:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.504938271604938) internal successors, (4058), 1620 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4058 transitions. [2021-08-21 11:57:54,192 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4058 transitions. Word has length 25 [2021-08-21 11:57:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:54,192 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 4058 transitions. [2021-08-21 11:57:54,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4058 transitions. [2021-08-21 11:57:54,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 11:57:54,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:54,195 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] [2021-08-21 11:57:54,214 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 11:57:54,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 11:57:54,405 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:54,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1500532664, now seen corresponding path program 9 times [2021-08-21 11:57:54,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:54,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714490663] [2021-08-21 11:57:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:54,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:54,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:54,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714490663] [2021-08-21 11:57:54,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714490663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:54,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229610280] [2021-08-21 11:57:54,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:57:54,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:54,438 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 11:57:54,440 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 11:57:54,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 11:57:54,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:54,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 11:57:54,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:57:54,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229610280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:54,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:54,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 11:57:54,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836541271] [2021-08-21 11:57:54,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:57:54,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:54,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:57:54,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:57:54,693 INFO L87 Difference]: Start difference. First operand 1621 states and 4058 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:54,744 INFO L93 Difference]: Finished difference Result 1941 states and 4622 transitions. [2021-08-21 11:57:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:57:54,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 11:57:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:54,751 INFO L225 Difference]: With dead ends: 1941 [2021-08-21 11:57:54,751 INFO L226 Difference]: Without dead ends: 1938 [2021-08-21 11:57:54,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:54,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-08-21 11:57:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1621. [2021-08-21 11:57:54,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.5) internal successors, (4050), 1620 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4050 transitions. [2021-08-21 11:57:54,797 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4050 transitions. Word has length 25 [2021-08-21 11:57:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:54,798 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 4050 transitions. [2021-08-21 11:57:54,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4050 transitions. [2021-08-21 11:57:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 11:57:54,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:54,800 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] [2021-08-21 11:57:54,819 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 11:57:55,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 11:57:55,002 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:55,003 INFO L82 PathProgramCache]: Analyzing trace with hash -137039792, now seen corresponding path program 10 times [2021-08-21 11:57:55,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:55,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385997787] [2021-08-21 11:57:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:55,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:55,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:55,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385997787] [2021-08-21 11:57:55,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385997787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:55,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716374824] [2021-08-21 11:57:55,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:57:55,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:55,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:55,041 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 11:57:55,057 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 11:57:55,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:57:55,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:55,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 11:57:55,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:55,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716374824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:55,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:55,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 11:57:55,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556706427] [2021-08-21 11:57:55,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:55,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:55,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:55,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:55,311 INFO L87 Difference]: Start difference. First operand 1621 states and 4050 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:55,378 INFO L93 Difference]: Finished difference Result 1932 states and 4596 transitions. [2021-08-21 11:57:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:57:55,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 11:57:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:55,384 INFO L225 Difference]: With dead ends: 1932 [2021-08-21 11:57:55,384 INFO L226 Difference]: Without dead ends: 1918 [2021-08-21 11:57:55,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:55,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-08-21 11:57:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1635. [2021-08-21 11:57:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 2.4871481028151776) internal successors, (4064), 1634 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 4064 transitions. [2021-08-21 11:57:55,416 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 4064 transitions. Word has length 25 [2021-08-21 11:57:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:55,416 INFO L470 AbstractCegarLoop]: Abstraction has 1635 states and 4064 transitions. [2021-08-21 11:57:55,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 4064 transitions. [2021-08-21 11:57:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 11:57:55,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:55,419 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] [2021-08-21 11:57:55,439 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 11:57:55,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 11:57:55,637 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:55,637 INFO L82 PathProgramCache]: Analyzing trace with hash 149669607, now seen corresponding path program 11 times [2021-08-21 11:57:55,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:55,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378695985] [2021-08-21 11:57:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:55,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:55,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:55,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378695985] [2021-08-21 11:57:55,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378695985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:55,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615642748] [2021-08-21 11:57:55,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:57:55,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:55,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:55,823 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 11:57:55,823 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 11:57:56,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:57:56,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:56,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:57:56,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:56,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615642748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:56,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:56,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:57:56,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839921440] [2021-08-21 11:57:56,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:57:56,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:56,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:57:56,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:57:56,321 INFO L87 Difference]: Start difference. First operand 1635 states and 4064 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:56,979 INFO L93 Difference]: Finished difference Result 2667 states and 6496 transitions. [2021-08-21 11:57:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 11:57:56,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 11:57:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:56,988 INFO L225 Difference]: With dead ends: 2667 [2021-08-21 11:57:56,988 INFO L226 Difference]: Without dead ends: 2634 [2021-08-21 11:57:56,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 494.9ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:57:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-08-21 11:57:57,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2167. [2021-08-21 11:57:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.5203139427516157) internal successors, (5459), 2166 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5459 transitions. [2021-08-21 11:57:57,032 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5459 transitions. Word has length 25 [2021-08-21 11:57:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:57,032 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 5459 transitions. [2021-08-21 11:57:57,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5459 transitions. [2021-08-21 11:57:57,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 11:57:57,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:57,036 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] [2021-08-21 11:57:57,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:57,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:57,249 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:57,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:57,249 INFO L82 PathProgramCache]: Analyzing trace with hash 552150559, now seen corresponding path program 12 times [2021-08-21 11:57:57,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:57,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801627639] [2021-08-21 11:57:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:57,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:57,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:57,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801627639] [2021-08-21 11:57:57,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801627639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:57,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852954986] [2021-08-21 11:57:57,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:57:57,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:57,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:57,441 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 11:57:57,442 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 11:57:57,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:57:57,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:57,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:57:57,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:57,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852954986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:57,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:57,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:57:57,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658603243] [2021-08-21 11:57:57,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:57:57,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:57,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:57:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:57:57,949 INFO L87 Difference]: Start difference. First operand 2167 states and 5459 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:58,559 INFO L93 Difference]: Finished difference Result 2799 states and 6877 transitions. [2021-08-21 11:57:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:57:58,559 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 11:57:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:58,568 INFO L225 Difference]: With dead ends: 2799 [2021-08-21 11:57:58,569 INFO L226 Difference]: Without dead ends: 2766 [2021-08-21 11:57:58,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-08-21 11:57:58,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-08-21 11:57:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2353. [2021-08-21 11:57:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 2352 states have (on average 2.5357142857142856) internal successors, (5964), 2352 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 5964 transitions. [2021-08-21 11:57:58,614 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 5964 transitions. Word has length 25 [2021-08-21 11:57:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:58,615 INFO L470 AbstractCegarLoop]: Abstraction has 2353 states and 5964 transitions. [2021-08-21 11:57:58,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 5964 transitions. [2021-08-21 11:57:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 11:57:58,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:58,618 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] [2021-08-21 11:57:58,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:58,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 11:57:58,845 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:58,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:58,846 INFO L82 PathProgramCache]: Analyzing trace with hash -127741465, now seen corresponding path program 13 times [2021-08-21 11:57:58,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:58,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124969121] [2021-08-21 11:57:58,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:58,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:59,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:59,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124969121] [2021-08-21 11:57:59,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124969121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:59,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957696829] [2021-08-21 11:57:59,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:57:59,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:59,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:59,026 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 11:57:59,027 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 11:57:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:59,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:57:59,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:59,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957696829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:59,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:59,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:57:59,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339203639] [2021-08-21 11:57:59,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:57:59,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:59,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:57:59,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:57:59,618 INFO L87 Difference]: Start difference. First operand 2353 states and 5964 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:00,238 INFO L93 Difference]: Finished difference Result 3085 states and 7606 transitions. [2021-08-21 11:58:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:58:00,239 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 11:58:00,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:00,245 INFO L225 Difference]: With dead ends: 3085 [2021-08-21 11:58:00,245 INFO L226 Difference]: Without dead ends: 3052 [2021-08-21 11:58:00,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:58:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-08-21 11:58:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2653. [2021-08-21 11:58:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 2.5448717948717947) internal successors, (6749), 2652 states have internal predecessors, (6749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 6749 transitions. [2021-08-21 11:58:00,294 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 6749 transitions. Word has length 25 [2021-08-21 11:58:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:00,294 INFO L470 AbstractCegarLoop]: Abstraction has 2653 states and 6749 transitions. [2021-08-21 11:58:00,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 6749 transitions. [2021-08-21 11:58:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 11:58:00,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:00,297 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] [2021-08-21 11:58:00,314 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 11:58:00,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:00,514 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:00,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:00,515 INFO L82 PathProgramCache]: Analyzing trace with hash -447763993, now seen corresponding path program 14 times [2021-08-21 11:58:00,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:00,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998189012] [2021-08-21 11:58:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:00,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:00,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:00,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998189012] [2021-08-21 11:58:00,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998189012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:00,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048835880] [2021-08-21 11:58:00,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:00,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:00,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:00,675 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 11:58:00,675 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 11:58:00,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:00,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:00,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:00,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:01,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048835880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:01,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:01,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:58:01,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782749274] [2021-08-21 11:58:01,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:58:01,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:01,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:58:01,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:01,257 INFO L87 Difference]: Start difference. First operand 2653 states and 6749 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:01,831 INFO L93 Difference]: Finished difference Result 3403 states and 8493 transitions. [2021-08-21 11:58:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:58:01,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 11:58:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:01,845 INFO L225 Difference]: With dead ends: 3403 [2021-08-21 11:58:01,845 INFO L226 Difference]: Without dead ends: 3367 [2021-08-21 11:58:01,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-08-21 11:58:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-08-21 11:58:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2970. [2021-08-21 11:58:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.560794880431122) internal successors, (7603), 2969 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 7603 transitions. [2021-08-21 11:58:01,894 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 7603 transitions. Word has length 25 [2021-08-21 11:58:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:01,894 INFO L470 AbstractCegarLoop]: Abstraction has 2970 states and 7603 transitions. [2021-08-21 11:58:01,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 7603 transitions. [2021-08-21 11:58:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 11:58:01,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:01,898 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] [2021-08-21 11:58:01,917 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 11:58:02,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:02,113 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:02,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:02,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1395198643, now seen corresponding path program 15 times [2021-08-21 11:58:02,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:02,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412367050] [2021-08-21 11:58:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:02,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:02,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:02,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412367050] [2021-08-21 11:58:02,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412367050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:02,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122627464] [2021-08-21 11:58:02,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:02,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:02,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:02,316 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 11:58:02,317 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 11:58:02,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:58:02,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:02,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:02,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122627464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:02,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:02,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:58:02,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642128003] [2021-08-21 11:58:02,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:58:02,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:58:02,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:02,925 INFO L87 Difference]: Start difference. First operand 2970 states and 7603 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:03,446 INFO L93 Difference]: Finished difference Result 3443 states and 8662 transitions. [2021-08-21 11:58:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:58:03,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 11:58:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:03,463 INFO L225 Difference]: With dead ends: 3443 [2021-08-21 11:58:03,463 INFO L226 Difference]: Without dead ends: 3410 [2021-08-21 11:58:03,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-08-21 11:58:03,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-08-21 11:58:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 3167. [2021-08-21 11:58:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 3166 states have (on average 2.5634870499052433) internal successors, (8116), 3166 states have internal predecessors, (8116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 8116 transitions. [2021-08-21 11:58:03,523 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 8116 transitions. Word has length 25 [2021-08-21 11:58:03,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:03,523 INFO L470 AbstractCegarLoop]: Abstraction has 3167 states and 8116 transitions. [2021-08-21 11:58:03,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 8116 transitions. [2021-08-21 11:58:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 11:58:03,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:03,527 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] [2021-08-21 11:58:03,544 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 11:58:03,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:03,741 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:03,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1838990563, now seen corresponding path program 16 times [2021-08-21 11:58:03,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:03,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886261186] [2021-08-21 11:58:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:03,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:03,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:03,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886261186] [2021-08-21 11:58:03,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886261186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:03,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064358134] [2021-08-21 11:58:03,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:03,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:03,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:03,921 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 11:58:03,924 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 11:58:04,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:04,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:04,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:04,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:04,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064358134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:04,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:04,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:58:04,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054317084] [2021-08-21 11:58:04,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:58:04,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:04,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:58:04,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:04,541 INFO L87 Difference]: Start difference. First operand 3167 states and 8116 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:05,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:05,022 INFO L93 Difference]: Finished difference Result 3520 states and 8898 transitions. [2021-08-21 11:58:05,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:58:05,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 11:58:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:05,029 INFO L225 Difference]: With dead ends: 3520 [2021-08-21 11:58:05,029 INFO L226 Difference]: Without dead ends: 3507 [2021-08-21 11:58:05,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 359.0ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-08-21 11:58:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-08-21 11:58:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3303. [2021-08-21 11:58:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.562992125984252) internal successors, (8463), 3302 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 8463 transitions. [2021-08-21 11:58:05,082 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 8463 transitions. Word has length 25 [2021-08-21 11:58:05,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:05,082 INFO L470 AbstractCegarLoop]: Abstraction has 3303 states and 8463 transitions. [2021-08-21 11:58:05,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 8463 transitions. [2021-08-21 11:58:05,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 11:58:05,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:05,087 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] [2021-08-21 11:58:05,105 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 11:58:05,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:05,301 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:05,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:05,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1207140103, now seen corresponding path program 17 times [2021-08-21 11:58:05,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:05,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116235037] [2021-08-21 11:58:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:05,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:05,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:05,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116235037] [2021-08-21 11:58:05,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116235037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:05,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311653611] [2021-08-21 11:58:05,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:05,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:05,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:05,479 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 11:58:05,480 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 11:58:05,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:58:05,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:05,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:05,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:06,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311653611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:06,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:06,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:58:06,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437204596] [2021-08-21 11:58:06,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:58:06,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:06,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:58:06,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:06,089 INFO L87 Difference]: Start difference. First operand 3303 states and 8463 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:06,572 INFO L93 Difference]: Finished difference Result 3850 states and 9692 transitions. [2021-08-21 11:58:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:58:06,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 11:58:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:06,579 INFO L225 Difference]: With dead ends: 3850 [2021-08-21 11:58:06,579 INFO L226 Difference]: Without dead ends: 3817 [2021-08-21 11:58:06,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-08-21 11:58:06,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-08-21 11:58:06,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3492. [2021-08-21 11:58:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.5665998281294757) internal successors, (8960), 3491 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 8960 transitions. [2021-08-21 11:58:06,629 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 8960 transitions. Word has length 25 [2021-08-21 11:58:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:06,629 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 8960 transitions. [2021-08-21 11:58:06,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 8960 transitions. [2021-08-21 11:58:06,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:06,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:06,634 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:06,653 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 11:58:06,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 11:58:06,848 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1789872158, now seen corresponding path program 3 times [2021-08-21 11:58:06,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:06,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809807691] [2021-08-21 11:58:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:06,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:06,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:06,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809807691] [2021-08-21 11:58:06,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809807691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:06,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190825770] [2021-08-21 11:58:06,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:06,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:06,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:06,953 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 11:58:06,954 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 11:58:07,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:58:07,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:07,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:58:07,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:07,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190825770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:07,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:07,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 11:58:07,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416731237] [2021-08-21 11:58:07,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:58:07,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:07,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:58:07,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:07,503 INFO L87 Difference]: Start difference. First operand 3492 states and 8960 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:07,699 INFO L93 Difference]: Finished difference Result 3385 states and 8558 transitions. [2021-08-21 11:58:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:58:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 11:58:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:07,704 INFO L225 Difference]: With dead ends: 3385 [2021-08-21 11:58:07,705 INFO L226 Difference]: Without dead ends: 3093 [2021-08-21 11:58:07,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:58:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-08-21 11:58:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 3088. [2021-08-21 11:58:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.557823129251701) internal successors, (7896), 3087 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 7896 transitions. [2021-08-21 11:58:07,748 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 7896 transitions. Word has length 26 [2021-08-21 11:58:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:07,748 INFO L470 AbstractCegarLoop]: Abstraction has 3088 states and 7896 transitions. [2021-08-21 11:58:07,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 7896 transitions. [2021-08-21 11:58:07,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 11:58:07,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:07,752 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:07,771 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 11:58:07,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 11:58:07,969 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:07,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:07,969 INFO L82 PathProgramCache]: Analyzing trace with hash -451219837, now seen corresponding path program 18 times [2021-08-21 11:58:07,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:07,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061394780] [2021-08-21 11:58:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:07,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:08,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:08,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061394780] [2021-08-21 11:58:08,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061394780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:08,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832188048] [2021-08-21 11:58:08,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:08,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:08,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:08,169 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 11:58:08,208 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 11:58:08,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:58:08,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:08,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 11:58:08,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:08,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832188048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:08,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:08,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 11:58:08,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606640498] [2021-08-21 11:58:08,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:58:08,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:08,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:58:08,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:58:08,928 INFO L87 Difference]: Start difference. First operand 3088 states and 7896 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:09,722 INFO L93 Difference]: Finished difference Result 3805 states and 9503 transitions. [2021-08-21 11:58:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 11:58:09,723 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 11:58:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:09,728 INFO L225 Difference]: With dead ends: 3805 [2021-08-21 11:58:09,728 INFO L226 Difference]: Without dead ends: 3772 [2021-08-21 11:58:09,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 474.8ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 11:58:09,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-08-21 11:58:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3327. [2021-08-21 11:58:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.5673481659651234) internal successors, (8539), 3326 states have internal predecessors, (8539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8539 transitions. [2021-08-21 11:58:09,777 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8539 transitions. Word has length 28 [2021-08-21 11:58:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:09,778 INFO L470 AbstractCegarLoop]: Abstraction has 3327 states and 8539 transitions. [2021-08-21 11:58:09,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8539 transitions. [2021-08-21 11:58:09,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 11:58:09,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:09,782 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:09,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:09,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:09,997 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:09,997 INFO L82 PathProgramCache]: Analyzing trace with hash 835620167, now seen corresponding path program 19 times [2021-08-21 11:58:09,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:09,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994105314] [2021-08-21 11:58:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:09,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:10,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:10,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994105314] [2021-08-21 11:58:10,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994105314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:10,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215084031] [2021-08-21 11:58:10,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:10,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:10,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:10,181 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 11:58:10,182 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 11:58:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:10,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 11:58:10,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:10,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215084031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:10,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:10,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 11:58:10,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559448213] [2021-08-21 11:58:10,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:58:10,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:10,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:58:10,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:58:10,930 INFO L87 Difference]: Start difference. First operand 3327 states and 8539 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:11,623 INFO L93 Difference]: Finished difference Result 3901 states and 9836 transitions. [2021-08-21 11:58:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:58:11,623 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 11:58:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:11,629 INFO L225 Difference]: With dead ends: 3901 [2021-08-21 11:58:11,629 INFO L226 Difference]: Without dead ends: 3868 [2021-08-21 11:58:11,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 500.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 11:58:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-08-21 11:58:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3566. [2021-08-21 11:58:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3565 states have (on average 2.571669004207574) internal successors, (9168), 3565 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 9168 transitions. [2021-08-21 11:58:11,694 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 9168 transitions. Word has length 28 [2021-08-21 11:58:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:11,694 INFO L470 AbstractCegarLoop]: Abstraction has 3566 states and 9168 transitions. [2021-08-21 11:58:11,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 9168 transitions. [2021-08-21 11:58:11,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 11:58:11,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:11,700 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:11,717 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 11:58:11,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:11,911 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:11,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2084456797, now seen corresponding path program 20 times [2021-08-21 11:58:11,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:11,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039092988] [2021-08-21 11:58:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:11,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:12,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:12,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039092988] [2021-08-21 11:58:12,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039092988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:12,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173862926] [2021-08-21 11:58:12,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:12,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:12,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:12,118 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 11:58:12,119 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 11:58:12,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:12,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:12,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 11:58:12,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:12,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173862926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:12,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:12,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 11:58:12,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041317983] [2021-08-21 11:58:12,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:58:12,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:12,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:58:12,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:58:12,894 INFO L87 Difference]: Start difference. First operand 3566 states and 9168 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:13,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:13,686 INFO L93 Difference]: Finished difference Result 4372 states and 10996 transitions. [2021-08-21 11:58:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:58:13,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 11:58:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:13,692 INFO L225 Difference]: With dead ends: 4372 [2021-08-21 11:58:13,693 INFO L226 Difference]: Without dead ends: 4339 [2021-08-21 11:58:13,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 555.4ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:58:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-08-21 11:58:13,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3961. [2021-08-21 11:58:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3960 states have (on average 2.5717171717171716) internal successors, (10184), 3960 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 10184 transitions. [2021-08-21 11:58:13,755 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 10184 transitions. Word has length 28 [2021-08-21 11:58:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:13,755 INFO L470 AbstractCegarLoop]: Abstraction has 3961 states and 10184 transitions. [2021-08-21 11:58:13,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 10184 transitions. [2021-08-21 11:58:13,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:13,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:13,760 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:13,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-21 11:58:13,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 11:58:13,977 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:13,977 INFO L82 PathProgramCache]: Analyzing trace with hash 992500067, now seen corresponding path program 4 times [2021-08-21 11:58:13,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:13,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347222485] [2021-08-21 11:58:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:13,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:14,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:14,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347222485] [2021-08-21 11:58:14,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347222485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:14,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935193975] [2021-08-21 11:58:14,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:14,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:14,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:14,015 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 11:58:14,015 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 11:58:14,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:14,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:14,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:58:14,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:14,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935193975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:14,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:14,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 11:58:14,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298024637] [2021-08-21 11:58:14,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:14,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:14,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:14,551 INFO L87 Difference]: Start difference. First operand 3961 states and 10184 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:14,647 INFO L93 Difference]: Finished difference Result 4649 states and 11665 transitions. [2021-08-21 11:58:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 11:58:14,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:14,653 INFO L225 Difference]: With dead ends: 4649 [2021-08-21 11:58:14,653 INFO L226 Difference]: Without dead ends: 4649 [2021-08-21 11:58:14,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2021-08-21 11:58:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4178. [2021-08-21 11:58:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.573617428776634) internal successors, (10750), 4177 states have internal predecessors, (10750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 10750 transitions. [2021-08-21 11:58:14,746 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 10750 transitions. Word has length 29 [2021-08-21 11:58:14,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:14,746 INFO L470 AbstractCegarLoop]: Abstraction has 4178 states and 10750 transitions. [2021-08-21 11:58:14,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 10750 transitions. [2021-08-21 11:58:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:14,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:14,752 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:14,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:14,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 11:58:14,965 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash -807763788, now seen corresponding path program 21 times [2021-08-21 11:58:14,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:14,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436153517] [2021-08-21 11:58:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:14,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:58:15,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:15,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436153517] [2021-08-21 11:58:15,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436153517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:15,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361320944] [2021-08-21 11:58:15,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:15,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:15,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:15,018 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 11:58:15,018 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 11:58:15,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:58:15,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 11:58:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:58:15,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361320944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:15,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:15,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-08-21 11:58:15,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365475620] [2021-08-21 11:58:15,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:58:15,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:15,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:58:15,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:15,558 INFO L87 Difference]: Start difference. First operand 4178 states and 10750 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:15,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:15,645 INFO L93 Difference]: Finished difference Result 3822 states and 9413 transitions. [2021-08-21 11:58:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:15,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 11:58:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:15,650 INFO L225 Difference]: With dead ends: 3822 [2021-08-21 11:58:15,650 INFO L226 Difference]: Without dead ends: 3822 [2021-08-21 11:58:15,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-08-21 11:58:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3081. [2021-08-21 11:58:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 2.523701298701299) internal successors, (7773), 3080 states have internal predecessors, (7773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 7773 transitions. [2021-08-21 11:58:15,691 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 7773 transitions. Word has length 29 [2021-08-21 11:58:15,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:15,691 INFO L470 AbstractCegarLoop]: Abstraction has 3081 states and 7773 transitions. [2021-08-21 11:58:15,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:15,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 7773 transitions. [2021-08-21 11:58:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:15,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:15,694 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:15,713 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 11:58:15,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 11:58:15,909 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:15,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:15,909 INFO L82 PathProgramCache]: Analyzing trace with hash -587660293, now seen corresponding path program 22 times [2021-08-21 11:58:15,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:15,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582128805] [2021-08-21 11:58:15,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:15,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:15,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:15,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582128805] [2021-08-21 11:58:15,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582128805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:15,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111139673] [2021-08-21 11:58:15,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:15,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:15,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:15,953 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 11:58:16,004 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 11:58:16,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:16,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:16,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 11:58:16,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:16,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111139673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:16,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:16,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 11:58:16,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295275337] [2021-08-21 11:58:16,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:16,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:16,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:16,533 INFO L87 Difference]: Start difference. First operand 3081 states and 7773 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:16,594 INFO L93 Difference]: Finished difference Result 3755 states and 9365 transitions. [2021-08-21 11:58:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:16,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 11:58:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:16,600 INFO L225 Difference]: With dead ends: 3755 [2021-08-21 11:58:16,600 INFO L226 Difference]: Without dead ends: 3743 [2021-08-21 11:58:16,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-08-21 11:58:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 3644. [2021-08-21 11:58:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 2.4888827889102387) internal successors, (9067), 3643 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 9067 transitions. [2021-08-21 11:58:16,649 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 9067 transitions. Word has length 29 [2021-08-21 11:58:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:16,649 INFO L470 AbstractCegarLoop]: Abstraction has 3644 states and 9067 transitions. [2021-08-21 11:58:16,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 9067 transitions. [2021-08-21 11:58:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:16,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:16,653 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:16,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 11:58:16,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:16,854 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:16,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1682739263, now seen corresponding path program 23 times [2021-08-21 11:58:16,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:16,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337630652] [2021-08-21 11:58:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:16,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:16,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:16,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337630652] [2021-08-21 11:58:16,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337630652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:16,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892452551] [2021-08-21 11:58:16,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:16,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:16,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:16,883 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 11:58:16,884 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 11:58:17,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:58:17,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:17,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 11:58:17,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:58:17,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892452551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:17,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:17,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 11:58:17,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096803955] [2021-08-21 11:58:17,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:58:17,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:17,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:58:17,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:58:17,432 INFO L87 Difference]: Start difference. First operand 3644 states and 9067 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:17,480 INFO L93 Difference]: Finished difference Result 3731 states and 9053 transitions. [2021-08-21 11:58:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 11:58:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:17,485 INFO L225 Difference]: With dead ends: 3731 [2021-08-21 11:58:17,485 INFO L226 Difference]: Without dead ends: 3731 [2021-08-21 11:58:17,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-08-21 11:58:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3636. [2021-08-21 11:58:17,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.4434662998624486) internal successors, (8882), 3635 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 8882 transitions. [2021-08-21 11:58:17,530 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 8882 transitions. Word has length 29 [2021-08-21 11:58:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:17,531 INFO L470 AbstractCegarLoop]: Abstraction has 3636 states and 8882 transitions. [2021-08-21 11:58:17,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 8882 transitions. [2021-08-21 11:58:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:17,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:17,534 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:17,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 11:58:17,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:17,735 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:17,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:17,736 INFO L82 PathProgramCache]: Analyzing trace with hash -712336569, now seen corresponding path program 24 times [2021-08-21 11:58:17,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:17,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667560077] [2021-08-21 11:58:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:17,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:17,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:17,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667560077] [2021-08-21 11:58:17,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667560077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:17,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192795853] [2021-08-21 11:58:17,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:17,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:17,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:17,765 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 11:58:17,823 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 11:58:18,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:58:18,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 11:58:18,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:58:18,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192795853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:18,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:18,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 11:58:18,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744063397] [2021-08-21 11:58:18,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:58:18,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:18,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:58:18,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:58:18,357 INFO L87 Difference]: Start difference. First operand 3636 states and 8882 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:18,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:18,411 INFO L93 Difference]: Finished difference Result 3810 states and 9235 transitions. [2021-08-21 11:58:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:58:18,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 11:58:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:18,416 INFO L225 Difference]: With dead ends: 3810 [2021-08-21 11:58:18,416 INFO L226 Difference]: Without dead ends: 3808 [2021-08-21 11:58:18,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:58:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2021-08-21 11:58:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3714. [2021-08-21 11:58:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.4368435227578775) internal successors, (9048), 3713 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 9048 transitions. [2021-08-21 11:58:18,461 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 9048 transitions. Word has length 29 [2021-08-21 11:58:18,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:18,461 INFO L470 AbstractCegarLoop]: Abstraction has 3714 states and 9048 transitions. [2021-08-21 11:58:18,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 9048 transitions. [2021-08-21 11:58:18,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:18,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:18,465 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:18,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 11:58:18,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:18,665 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:18,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:18,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1117704309, now seen corresponding path program 25 times [2021-08-21 11:58:18,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:18,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079193527] [2021-08-21 11:58:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:18,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:18,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:18,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079193527] [2021-08-21 11:58:18,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079193527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:18,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949363017] [2021-08-21 11:58:18,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:18,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:18,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:18,697 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 11:58:18,718 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 11:58:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:19,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 11:58:19,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:58:19,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949363017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:19,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:19,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 11:58:19,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328682712] [2021-08-21 11:58:19,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:58:19,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:19,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:58:19,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:58:19,287 INFO L87 Difference]: Start difference. First operand 3714 states and 9048 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:19,339 INFO L93 Difference]: Finished difference Result 3976 states and 9563 transitions. [2021-08-21 11:58:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:19,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 11:58:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:19,345 INFO L225 Difference]: With dead ends: 3976 [2021-08-21 11:58:19,345 INFO L226 Difference]: Without dead ends: 3973 [2021-08-21 11:58:19,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2021-08-21 11:58:19,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3873. [2021-08-21 11:58:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3872 states have (on average 2.424586776859504) internal successors, (9388), 3872 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:19,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 9388 transitions. [2021-08-21 11:58:19,394 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 9388 transitions. Word has length 29 [2021-08-21 11:58:19,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:19,394 INFO L470 AbstractCegarLoop]: Abstraction has 3873 states and 9388 transitions. [2021-08-21 11:58:19,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 9388 transitions. [2021-08-21 11:58:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:19,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:19,403 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:19,422 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 11:58:19,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 11:58:19,617 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:19,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:19,617 INFO L82 PathProgramCache]: Analyzing trace with hash -652390267, now seen corresponding path program 26 times [2021-08-21 11:58:19,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:19,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630596443] [2021-08-21 11:58:19,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:19,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:19,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:19,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630596443] [2021-08-21 11:58:19,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630596443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:19,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390348485] [2021-08-21 11:58:19,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:19,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:19,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:19,653 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 11:58:19,653 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 11:58:20,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:20,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:20,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 11:58:20,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:20,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390348485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:20,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:20,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 11:58:20,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649407102] [2021-08-21 11:58:20,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:20,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:20,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:20,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:20,233 INFO L87 Difference]: Start difference. First operand 3873 states and 9388 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:20,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:20,318 INFO L93 Difference]: Finished difference Result 3970 states and 9396 transitions. [2021-08-21 11:58:20,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:20,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 11:58:20,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:20,325 INFO L225 Difference]: With dead ends: 3970 [2021-08-21 11:58:20,325 INFO L226 Difference]: Without dead ends: 3967 [2021-08-21 11:58:20,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-08-21 11:58:20,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 3722. [2021-08-21 11:58:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 2.3931738779897875) internal successors, (8905), 3721 states have internal predecessors, (8905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 8905 transitions. [2021-08-21 11:58:20,406 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 8905 transitions. Word has length 29 [2021-08-21 11:58:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:20,407 INFO L470 AbstractCegarLoop]: Abstraction has 3722 states and 8905 transitions. [2021-08-21 11:58:20,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 8905 transitions. [2021-08-21 11:58:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 11:58:20,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:20,412 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:20,434 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 11:58:20,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:20,629 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1507088031, now seen corresponding path program 27 times [2021-08-21 11:58:20,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:20,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203027497] [2021-08-21 11:58:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:20,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:58:20,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:20,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203027497] [2021-08-21 11:58:20,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203027497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:20,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063997822] [2021-08-21 11:58:20,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:20,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:20,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:20,840 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 11:58:20,840 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 11:58:21,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 11:58:21,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:21,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 11:58:21,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:21,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063997822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:21,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:21,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 11:58:21,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176014265] [2021-08-21 11:58:21,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 11:58:21,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:21,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 11:58:21,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:58:21,771 INFO L87 Difference]: Start difference. First operand 3722 states and 8905 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:22,853 INFO L93 Difference]: Finished difference Result 4929 states and 11573 transitions. [2021-08-21 11:58:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 11:58:22,853 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 11:58:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:22,860 INFO L225 Difference]: With dead ends: 4929 [2021-08-21 11:58:22,860 INFO L226 Difference]: Without dead ends: 4855 [2021-08-21 11:58:22,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 829.5ms TimeCoverageRelationStatistics Valid=257, Invalid=2193, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 11:58:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2021-08-21 11:58:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4204. [2021-08-21 11:58:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4204 states, 4203 states have (on average 2.3925767309064954) internal successors, (10056), 4203 states have internal predecessors, (10056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 10056 transitions. [2021-08-21 11:58:22,916 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 10056 transitions. Word has length 31 [2021-08-21 11:58:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:22,917 INFO L470 AbstractCegarLoop]: Abstraction has 4204 states and 10056 transitions. [2021-08-21 11:58:22,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 10056 transitions. [2021-08-21 11:58:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 11:58:22,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:22,922 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:22,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:23,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:23,139 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:23,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:23,140 INFO L82 PathProgramCache]: Analyzing trace with hash 433801063, now seen corresponding path program 28 times [2021-08-21 11:58:23,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:23,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237323614] [2021-08-21 11:58:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:23,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:58:23,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:23,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237323614] [2021-08-21 11:58:23,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237323614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:23,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641914488] [2021-08-21 11:58:23,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:23,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:23,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:23,385 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 11:58:23,385 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 11:58:23,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:23,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:23,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 11:58:23,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:24,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641914488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:24,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:24,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 11:58:24,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720364350] [2021-08-21 11:58:24,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 11:58:24,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:24,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 11:58:24,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:58:24,348 INFO L87 Difference]: Start difference. First operand 4204 states and 10056 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:25,331 INFO L93 Difference]: Finished difference Result 5234 states and 12282 transitions. [2021-08-21 11:58:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 11:58:25,332 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 11:58:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:25,339 INFO L225 Difference]: With dead ends: 5234 [2021-08-21 11:58:25,339 INFO L226 Difference]: Without dead ends: 5194 [2021-08-21 11:58:25,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 725.0ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 11:58:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-08-21 11:58:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4469. [2021-08-21 11:58:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 4468 states have (on average 2.3983885407341092) internal successors, (10716), 4468 states have internal predecessors, (10716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 10716 transitions. [2021-08-21 11:58:25,400 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 10716 transitions. Word has length 31 [2021-08-21 11:58:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:25,400 INFO L470 AbstractCegarLoop]: Abstraction has 4469 states and 10716 transitions. [2021-08-21 11:58:25,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 10716 transitions. [2021-08-21 11:58:25,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 11:58:25,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:25,405 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:25,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 11:58:25,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 11:58:25,609 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:25,609 INFO L82 PathProgramCache]: Analyzing trace with hash 113778535, now seen corresponding path program 29 times [2021-08-21 11:58:25,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:25,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350542440] [2021-08-21 11:58:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:25,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:58:25,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:25,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350542440] [2021-08-21 11:58:25,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350542440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:25,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631603516] [2021-08-21 11:58:25,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:25,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:25,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:25,803 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 11:58:25,803 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 11:58:26,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 11:58:26,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:26,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 11:58:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:26,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631603516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:26,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:26,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 11:58:26,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123912776] [2021-08-21 11:58:26,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 11:58:26,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:26,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 11:58:26,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:58:26,802 INFO L87 Difference]: Start difference. First operand 4469 states and 10716 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:27,854 INFO L93 Difference]: Finished difference Result 5435 states and 12809 transitions. [2021-08-21 11:58:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 11:58:27,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 11:58:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:27,861 INFO L225 Difference]: With dead ends: 5435 [2021-08-21 11:58:27,862 INFO L226 Difference]: Without dead ends: 5402 [2021-08-21 11:58:27,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 834.3ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 11:58:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-08-21 11:58:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 4799. [2021-08-21 11:58:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 2.4022509378907877) internal successors, (11526), 4798 states have internal predecessors, (11526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 11526 transitions. [2021-08-21 11:58:27,928 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 11526 transitions. Word has length 31 [2021-08-21 11:58:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:27,928 INFO L470 AbstractCegarLoop]: Abstraction has 4799 states and 11526 transitions. [2021-08-21 11:58:27,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:27,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 11526 transitions. [2021-08-21 11:58:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 11:58:27,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:27,932 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:27,950 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 11:58:28,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 11:58:28,142 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:28,142 INFO L82 PathProgramCache]: Analyzing trace with hash -833656115, now seen corresponding path program 30 times [2021-08-21 11:58:28,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:28,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071452433] [2021-08-21 11:58:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:28,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:58:28,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:28,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071452433] [2021-08-21 11:58:28,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071452433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:28,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544275391] [2021-08-21 11:58:28,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:28,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:28,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:28,329 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 11:58:28,368 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 11:58:28,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 11:58:28,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:28,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 11:58:28,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:29,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544275391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:29,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:29,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 11:58:29,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94659438] [2021-08-21 11:58:29,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 11:58:29,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:29,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 11:58:29,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:58:29,380 INFO L87 Difference]: Start difference. First operand 4799 states and 11526 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:30,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:30,280 INFO L93 Difference]: Finished difference Result 5530 states and 13106 transitions. [2021-08-21 11:58:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 11:58:30,280 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 11:58:30,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:30,288 INFO L225 Difference]: With dead ends: 5530 [2021-08-21 11:58:30,288 INFO L226 Difference]: Without dead ends: 5486 [2021-08-21 11:58:30,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 666.3ms TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:58:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-08-21 11:58:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5052. [2021-08-21 11:58:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5051 states have (on average 2.404474361512572) internal successors, (12145), 5051 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 12145 transitions. [2021-08-21 11:58:30,358 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 12145 transitions. Word has length 31 [2021-08-21 11:58:30,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:30,358 INFO L470 AbstractCegarLoop]: Abstraction has 5052 states and 12145 transitions. [2021-08-21 11:58:30,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 12145 transitions. [2021-08-21 11:58:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:30,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:30,363 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:30,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:30,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 11:58:30,581 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash 364490902, now seen corresponding path program 31 times [2021-08-21 11:58:30,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:30,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116487481] [2021-08-21 11:58:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:30,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:30,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:30,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116487481] [2021-08-21 11:58:30,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116487481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:30,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779822729] [2021-08-21 11:58:30,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:30,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:30,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:30,733 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 11:58:30,734 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 11:58:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:31,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:31,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:31,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779822729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:31,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:31,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 11:58:31,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172307068] [2021-08-21 11:58:31,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:58:31,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:31,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:58:31,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:58:31,668 INFO L87 Difference]: Start difference. First operand 5052 states and 12145 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:32,066 INFO L93 Difference]: Finished difference Result 5662 states and 13472 transitions. [2021-08-21 11:58:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 11:58:32,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:58:32,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:32,074 INFO L225 Difference]: With dead ends: 5662 [2021-08-21 11:58:32,074 INFO L226 Difference]: Without dead ends: 5648 [2021-08-21 11:58:32,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:58:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5648 states. [2021-08-21 11:58:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5648 to 5352. [2021-08-21 11:58:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 2.4075873668473182) internal successors, (12883), 5351 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 12883 transitions. [2021-08-21 11:58:32,141 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 12883 transitions. Word has length 32 [2021-08-21 11:58:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:32,142 INFO L470 AbstractCegarLoop]: Abstraction has 5352 states and 12883 transitions. [2021-08-21 11:58:32,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 12883 transitions. [2021-08-21 11:58:32,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:32,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:32,146 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:32,164 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 11:58:32,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 11:58:32,347 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:32,347 INFO L82 PathProgramCache]: Analyzing trace with hash -870392482, now seen corresponding path program 32 times [2021-08-21 11:58:32,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:32,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938367398] [2021-08-21 11:58:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:32,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:32,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:32,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938367398] [2021-08-21 11:58:32,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938367398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:32,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026806188] [2021-08-21 11:58:32,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:32,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:32,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:32,535 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 11:58:32,537 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 11:58:33,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:33,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:33,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:33,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:33,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026806188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:33,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:33,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 11:58:33,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235503056] [2021-08-21 11:58:33,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:58:33,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:33,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:58:33,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:58:33,517 INFO L87 Difference]: Start difference. First operand 5352 states and 12883 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:33,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:33,901 INFO L93 Difference]: Finished difference Result 5807 states and 13850 transitions. [2021-08-21 11:58:33,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:58:33,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:58:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:33,909 INFO L225 Difference]: With dead ends: 5807 [2021-08-21 11:58:33,909 INFO L226 Difference]: Without dead ends: 5793 [2021-08-21 11:58:33,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:58:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2021-08-21 11:58:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 5524. [2021-08-21 11:58:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4110085098678256) internal successors, (13316), 5523 states have internal predecessors, (13316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13316 transitions. [2021-08-21 11:58:34,000 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13316 transitions. Word has length 32 [2021-08-21 11:58:34,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:34,000 INFO L470 AbstractCegarLoop]: Abstraction has 5524 states and 13316 transitions. [2021-08-21 11:58:34,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13316 transitions. [2021-08-21 11:58:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:34,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:34,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:34,025 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 11:58:34,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 11:58:34,223 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:34,223 INFO L82 PathProgramCache]: Analyzing trace with hash -613818218, now seen corresponding path program 33 times [2021-08-21 11:58:34,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:34,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822098686] [2021-08-21 11:58:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:34,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:34,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:34,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822098686] [2021-08-21 11:58:34,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822098686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:34,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313676651] [2021-08-21 11:58:34,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:34,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:34,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:34,376 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 11:58:34,376 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 11:58:35,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:58:35,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:35,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:35,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:35,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313676651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:35,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:35,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:58:35,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698733246] [2021-08-21 11:58:35,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:58:35,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:35,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:58:35,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:35,403 INFO L87 Difference]: Start difference. First operand 5524 states and 13316 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 11:58:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:35,969 INFO L93 Difference]: Finished difference Result 6674 states and 15890 transitions. [2021-08-21 11:58:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:58:35,970 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 32 [2021-08-21 11:58:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:35,979 INFO L225 Difference]: With dead ends: 6674 [2021-08-21 11:58:35,979 INFO L226 Difference]: Without dead ends: 6644 [2021-08-21 11:58:35,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:58:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2021-08-21 11:58:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 5926. [2021-08-21 11:58:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 2.416877637130802) internal successors, (14320), 5925 states have internal predecessors, (14320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 14320 transitions. [2021-08-21 11:58:36,067 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 14320 transitions. Word has length 32 [2021-08-21 11:58:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:36,067 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 14320 transitions. [2021-08-21 11:58:36,067 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 11:58:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 14320 transitions. [2021-08-21 11:58:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:36,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:36,073 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:36,094 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 11:58:36,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 11:58:36,289 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:36,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:36,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1401588830, now seen corresponding path program 34 times [2021-08-21 11:58:36,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:36,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676793163] [2021-08-21 11:58:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:36,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:36,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:36,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676793163] [2021-08-21 11:58:36,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676793163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:36,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108038768] [2021-08-21 11:58:36,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:36,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:36,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:36,430 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 11:58:36,468 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 11:58:37,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:37,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:37,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:37,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108038768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:37,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:37,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:58:37,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427707495] [2021-08-21 11:58:37,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:58:37,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:58:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:37,538 INFO L87 Difference]: Start difference. First operand 5926 states and 14320 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:37,887 INFO L93 Difference]: Finished difference Result 7466 states and 17775 transitions. [2021-08-21 11:58:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 11:58:37,888 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:58:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:37,898 INFO L225 Difference]: With dead ends: 7466 [2021-08-21 11:58:37,898 INFO L226 Difference]: Without dead ends: 7426 [2021-08-21 11:58:37,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:58:37,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-08-21 11:58:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 6811. [2021-08-21 11:58:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6811 states, 6810 states have (on average 2.4252569750367106) internal successors, (16516), 6810 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6811 states to 6811 states and 16516 transitions. [2021-08-21 11:58:37,993 INFO L78 Accepts]: Start accepts. Automaton has 6811 states and 16516 transitions. Word has length 32 [2021-08-21 11:58:37,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:37,993 INFO L470 AbstractCegarLoop]: Abstraction has 6811 states and 16516 transitions. [2021-08-21 11:58:37,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 6811 states and 16516 transitions. [2021-08-21 11:58:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:37,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:37,999 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:38,017 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 11:58:38,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 11:58:38,200 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:38,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1434729592, now seen corresponding path program 35 times [2021-08-21 11:58:38,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:38,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273561721] [2021-08-21 11:58:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:38,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:38,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:38,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273561721] [2021-08-21 11:58:38,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273561721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:38,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914409600] [2021-08-21 11:58:38,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:38,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:38,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:38,360 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 11:58:38,361 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 11:58:39,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:58:39,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:39,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:39,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:39,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914409600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:39,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:39,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 11:58:39,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431999012] [2021-08-21 11:58:39,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:58:39,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:39,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:58:39,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:39,435 INFO L87 Difference]: Start difference. First operand 6811 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:39,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:39,787 INFO L93 Difference]: Finished difference Result 7186 states and 17309 transitions. [2021-08-21 11:58:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 11:58:39,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:58:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:39,798 INFO L225 Difference]: With dead ends: 7186 [2021-08-21 11:58:39,798 INFO L226 Difference]: Without dead ends: 7172 [2021-08-21 11:58:39,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-08-21 11:58:39,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7172 states. [2021-08-21 11:58:39,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7172 to 6996. [2021-08-21 11:58:39,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 2.4264474624731953) internal successors, (16973), 6995 states have internal predecessors, (16973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 16973 transitions. [2021-08-21 11:58:39,906 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 16973 transitions. Word has length 32 [2021-08-21 11:58:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:39,906 INFO L470 AbstractCegarLoop]: Abstraction has 6996 states and 16973 transitions. [2021-08-21 11:58:39,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 16973 transitions. [2021-08-21 11:58:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:39,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:39,912 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:39,930 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 11:58:40,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 11:58:40,113 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:40,113 INFO L82 PathProgramCache]: Analyzing trace with hash 837251720, now seen corresponding path program 36 times [2021-08-21 11:58:40,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:40,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23271099] [2021-08-21 11:58:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:40,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:40,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:40,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23271099] [2021-08-21 11:58:40,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23271099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:40,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183176005] [2021-08-21 11:58:40,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:40,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:40,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:40,267 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 11:58:40,269 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 11:58:41,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:58:41,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:41,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:41,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183176005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:41,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:41,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:58:41,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876182594] [2021-08-21 11:58:41,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:58:41,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:41,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:58:41,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:41,450 INFO L87 Difference]: Start difference. First operand 6996 states and 16973 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:41,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:41,786 INFO L93 Difference]: Finished difference Result 8381 states and 20098 transitions. [2021-08-21 11:58:41,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:58:41,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:58:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:41,798 INFO L225 Difference]: With dead ends: 8381 [2021-08-21 11:58:41,798 INFO L226 Difference]: Without dead ends: 8341 [2021-08-21 11:58:41,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 397.0ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-08-21 11:58:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8341 states. [2021-08-21 11:58:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 7795. [2021-08-21 11:58:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 2.4280215550423403) internal successors, (18924), 7794 states have internal predecessors, (18924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 18924 transitions. [2021-08-21 11:58:41,910 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 18924 transitions. Word has length 32 [2021-08-21 11:58:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:41,910 INFO L470 AbstractCegarLoop]: Abstraction has 7795 states and 18924 transitions. [2021-08-21 11:58:41,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 18924 transitions. [2021-08-21 11:58:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:41,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:41,917 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:41,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 11:58:42,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:42,118 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:42,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:42,118 INFO L82 PathProgramCache]: Analyzing trace with hash -609168994, now seen corresponding path program 37 times [2021-08-21 11:58:42,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:42,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190495241] [2021-08-21 11:58:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:42,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:42,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:42,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190495241] [2021-08-21 11:58:42,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190495241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:42,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837927284] [2021-08-21 11:58:42,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:42,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:42,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:42,285 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 11:58:42,345 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 11:58:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:43,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:43,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:43,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837927284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:43,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:43,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 11:58:43,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765466463] [2021-08-21 11:58:43,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:58:43,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:43,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:58:43,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:58:43,489 INFO L87 Difference]: Start difference. First operand 7795 states and 18924 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:43,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:43,957 INFO L93 Difference]: Finished difference Result 9510 states and 22724 transitions. [2021-08-21 11:58:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:58:43,958 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:58:43,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:43,972 INFO L225 Difference]: With dead ends: 9510 [2021-08-21 11:58:43,972 INFO L226 Difference]: Without dead ends: 9476 [2021-08-21 11:58:43,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-08-21 11:58:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9476 states. [2021-08-21 11:58:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9476 to 8348. [2021-08-21 11:58:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8348 states, 8347 states have (on average 2.434527375104828) internal successors, (20321), 8347 states have internal predecessors, (20321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8348 states to 8348 states and 20321 transitions. [2021-08-21 11:58:44,097 INFO L78 Accepts]: Start accepts. Automaton has 8348 states and 20321 transitions. Word has length 32 [2021-08-21 11:58:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:44,097 INFO L470 AbstractCegarLoop]: Abstraction has 8348 states and 20321 transitions. [2021-08-21 11:58:44,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 8348 states and 20321 transitions. [2021-08-21 11:58:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:44,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:44,104 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:44,124 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 11:58:44,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:44,305 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:44,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:44,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1086215526, now seen corresponding path program 38 times [2021-08-21 11:58:44,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:44,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219852907] [2021-08-21 11:58:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:44,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:44,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:44,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219852907] [2021-08-21 11:58:44,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219852907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:44,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400558501] [2021-08-21 11:58:44,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:44,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:44,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:44,474 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 11:58:44,476 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 11:58:45,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:45,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:45,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:45,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:45,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400558501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:45,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:45,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:58:45,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343303468] [2021-08-21 11:58:45,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:58:45,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:45,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:58:45,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:45,642 INFO L87 Difference]: Start difference. First operand 8348 states and 20321 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:46,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:46,067 INFO L93 Difference]: Finished difference Result 9488 states and 22893 transitions. [2021-08-21 11:58:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:58:46,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:58:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:46,082 INFO L225 Difference]: With dead ends: 9488 [2021-08-21 11:58:46,082 INFO L226 Difference]: Without dead ends: 9449 [2021-08-21 11:58:46,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-08-21 11:58:46,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-08-21 11:58:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 8723. [2021-08-21 11:58:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8723 states, 8722 states have (on average 2.4369410685622563) internal successors, (21255), 8722 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 21255 transitions. [2021-08-21 11:58:46,206 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 21255 transitions. Word has length 32 [2021-08-21 11:58:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:46,206 INFO L470 AbstractCegarLoop]: Abstraction has 8723 states and 21255 transitions. [2021-08-21 11:58:46,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:46,207 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 21255 transitions. [2021-08-21 11:58:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:46,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:46,214 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:46,232 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 11:58:46,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 11:58:46,422 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:46,422 INFO L82 PathProgramCache]: Analyzing trace with hash 505632738, now seen corresponding path program 39 times [2021-08-21 11:58:46,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:46,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493820296] [2021-08-21 11:58:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:46,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:46,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:46,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493820296] [2021-08-21 11:58:46,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493820296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:46,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088864680] [2021-08-21 11:58:46,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:46,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:46,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:46,581 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 11:58:46,614 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 11:58:47,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:58:47,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:47,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:47,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:47,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088864680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:47,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:47,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:58:47,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913090349] [2021-08-21 11:58:47,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:58:47,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:47,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:58:47,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:47,793 INFO L87 Difference]: Start difference. First operand 8723 states and 21255 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 11:58:48,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:48,308 INFO L93 Difference]: Finished difference Result 11530 states and 27803 transitions. [2021-08-21 11:58:48,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:58:48,308 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 32 [2021-08-21 11:58:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:48,326 INFO L225 Difference]: With dead ends: 11530 [2021-08-21 11:58:48,326 INFO L226 Difference]: Without dead ends: 11490 [2021-08-21 11:58:48,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-08-21 11:58:48,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2021-08-21 11:58:48,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 9431. [2021-08-21 11:58:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9431 states, 9430 states have (on average 2.4407211028632028) internal successors, (23016), 9430 states have internal predecessors, (23016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9431 states to 9431 states and 23016 transitions. [2021-08-21 11:58:48,523 INFO L78 Accepts]: Start accepts. Automaton has 9431 states and 23016 transitions. Word has length 32 [2021-08-21 11:58:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:48,523 INFO L470 AbstractCegarLoop]: Abstraction has 9431 states and 23016 transitions. [2021-08-21 11:58:48,523 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 11:58:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 9431 states and 23016 transitions. [2021-08-21 11:58:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:48,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:48,534 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:48,554 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 11:58:48,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 11:58:48,745 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:48,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:48,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1012014960, now seen corresponding path program 40 times [2021-08-21 11:58:48,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:48,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535993636] [2021-08-21 11:58:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:48,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:48,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:48,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535993636] [2021-08-21 11:58:48,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535993636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:48,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031061578] [2021-08-21 11:58:48,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:48,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:48,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:48,926 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 11:58:48,944 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 11:58:49,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:49,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:49,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:49,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:50,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031061578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:50,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:50,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-08-21 11:58:50,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978945554] [2021-08-21 11:58:50,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:58:50,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:58:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:58:50,163 INFO L87 Difference]: Start difference. First operand 9431 states and 23016 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:50,487 INFO L93 Difference]: Finished difference Result 10586 states and 25593 transitions. [2021-08-21 11:58:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:58:50,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:58:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:50,501 INFO L225 Difference]: With dead ends: 10586 [2021-08-21 11:58:50,502 INFO L226 Difference]: Without dead ends: 10559 [2021-08-21 11:58:50,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:58:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-08-21 11:58:50,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 10133. [2021-08-21 11:58:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 2.438709040663245) internal successors, (24709), 10132 states have internal predecessors, (24709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 24709 transitions. [2021-08-21 11:58:50,646 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 24709 transitions. Word has length 32 [2021-08-21 11:58:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:50,646 INFO L470 AbstractCegarLoop]: Abstraction has 10133 states and 24709 transitions. [2021-08-21 11:58:50,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 24709 transitions. [2021-08-21 11:58:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:50,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:50,656 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:50,674 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 11:58:50,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 11:58:50,857 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:50,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:50,857 INFO L82 PathProgramCache]: Analyzing trace with hash -950309500, now seen corresponding path program 41 times [2021-08-21 11:58:50,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:50,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211699293] [2021-08-21 11:58:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:50,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:51,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:51,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211699293] [2021-08-21 11:58:51,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211699293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:51,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300245604] [2021-08-21 11:58:51,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:51,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:51,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:51,008 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 11:58:51,010 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 11:58:51,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:58:51,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:51,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:51,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:52,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300245604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:52,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:52,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 11:58:52,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836898119] [2021-08-21 11:58:52,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:58:52,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:58:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:58:52,269 INFO L87 Difference]: Start difference. First operand 10133 states and 24709 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:52,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:52,587 INFO L93 Difference]: Finished difference Result 11077 states and 26854 transitions. [2021-08-21 11:58:52,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 11:58:52,587 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:58:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:52,601 INFO L225 Difference]: With dead ends: 11077 [2021-08-21 11:58:52,601 INFO L226 Difference]: Without dead ends: 11043 [2021-08-21 11:58:52,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:58:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2021-08-21 11:58:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10335. [2021-08-21 11:58:52,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.439713566866654) internal successors, (25212), 10334 states have internal predecessors, (25212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 25212 transitions. [2021-08-21 11:58:52,729 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 25212 transitions. Word has length 32 [2021-08-21 11:58:52,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:52,729 INFO L470 AbstractCegarLoop]: Abstraction has 10335 states and 25212 transitions. [2021-08-21 11:58:52,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 25212 transitions. [2021-08-21 11:58:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:52,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:52,737 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:52,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:52,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:52,937 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:52,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1630201524, now seen corresponding path program 42 times [2021-08-21 11:58:52,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:52,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686213368] [2021-08-21 11:58:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:52,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:53,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:53,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686213368] [2021-08-21 11:58:53,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686213368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:53,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318712213] [2021-08-21 11:58:53,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:53,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:53,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:53,071 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 11:58:53,072 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 11:58:54,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:58:54,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:54,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:58:54,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:54,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318712213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:54,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:54,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:58:54,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856718447] [2021-08-21 11:58:54,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:58:54,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:54,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:58:54,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:54,369 INFO L87 Difference]: Start difference. First operand 10335 states and 25212 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:54,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:54,680 INFO L93 Difference]: Finished difference Result 11359 states and 27517 transitions. [2021-08-21 11:58:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:58:54,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:58:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:54,694 INFO L225 Difference]: With dead ends: 11359 [2021-08-21 11:58:54,695 INFO L226 Difference]: Without dead ends: 11319 [2021-08-21 11:58:54,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 305.1ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-08-21 11:58:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11319 states. [2021-08-21 11:58:54,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11319 to 10443. [2021-08-21 11:58:54,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10443 states, 10442 states have (on average 2.439666730511396) internal successors, (25475), 10442 states have internal predecessors, (25475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10443 states to 10443 states and 25475 transitions. [2021-08-21 11:58:54,828 INFO L78 Accepts]: Start accepts. Automaton has 10443 states and 25475 transitions. Word has length 32 [2021-08-21 11:58:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:54,829 INFO L470 AbstractCegarLoop]: Abstraction has 10443 states and 25475 transitions. [2021-08-21 11:58:54,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 10443 states and 25475 transitions. [2021-08-21 11:58:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 11:58:54,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:54,837 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:54,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 11:58:55,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 11:58:55,038 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash 849603847, now seen corresponding path program 5 times [2021-08-21 11:58:55,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:55,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451249254] [2021-08-21 11:58:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:55,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 11:58:55,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:55,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451249254] [2021-08-21 11:58:55,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451249254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:55,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652846445] [2021-08-21 11:58:55,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:55,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:55,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:55,143 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 11:58:55,145 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 11:58:56,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:58:56,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:56,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:58:56,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 11:58:56,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652846445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:56,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:56,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 11:58:56,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892285530] [2021-08-21 11:58:56,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:58:56,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:58:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:56,328 INFO L87 Difference]: Start difference. First operand 10443 states and 25475 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:56,569 INFO L93 Difference]: Finished difference Result 10579 states and 25763 transitions. [2021-08-21 11:58:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:58:56,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 11:58:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:56,583 INFO L225 Difference]: With dead ends: 10579 [2021-08-21 11:58:56,583 INFO L226 Difference]: Without dead ends: 10480 [2021-08-21 11:58:56,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:58:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10480 states. [2021-08-21 11:58:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10480 to 10452. [2021-08-21 11:58:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 2.4395751602717444) internal successors, (25496), 10451 states have internal predecessors, (25496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:56,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 25496 transitions. [2021-08-21 11:58:56,747 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 25496 transitions. Word has length 33 [2021-08-21 11:58:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:56,747 INFO L470 AbstractCegarLoop]: Abstraction has 10452 states and 25496 transitions. [2021-08-21 11:58:56,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 25496 transitions. [2021-08-21 11:58:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:58:56,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:56,757 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:56,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:56,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:56,962 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:56,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:56,962 INFO L82 PathProgramCache]: Analyzing trace with hash 176267436, now seen corresponding path program 43 times [2021-08-21 11:58:56,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:56,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467493539] [2021-08-21 11:58:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:56,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:58:57,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:57,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467493539] [2021-08-21 11:58:57,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467493539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:57,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424249999] [2021-08-21 11:58:57,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:57,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:57,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:57,012 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 11:58:57,012 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 11:58:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:58:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:58:58,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424249999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:58,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:58,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 11:58:58,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037080346] [2021-08-21 11:58:58,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:58,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:58,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:58,111 INFO L87 Difference]: Start difference. First operand 10452 states and 25496 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 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 11:58:58,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:58,275 INFO L93 Difference]: Finished difference Result 13175 states and 31451 transitions. [2021-08-21 11:58:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:58:58,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 11:58:58,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:58,300 INFO L225 Difference]: With dead ends: 13175 [2021-08-21 11:58:58,300 INFO L226 Difference]: Without dead ends: 13175 [2021-08-21 11:58:58,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:58:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13175 states. [2021-08-21 11:58:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13175 to 10253. [2021-08-21 11:58:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 2.4039211861100274) internal successors, (24645), 10252 states have internal predecessors, (24645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 24645 transitions. [2021-08-21 11:58:58,522 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 24645 transitions. Word has length 35 [2021-08-21 11:58:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:58,522 INFO L470 AbstractCegarLoop]: Abstraction has 10253 states and 24645 transitions. [2021-08-21 11:58:58,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 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 11:58:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 24645 transitions. [2021-08-21 11:58:58,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:58:58,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:58,533 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:58,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 11:58:58,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 11:58:58,734 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:58,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:58,734 INFO L82 PathProgramCache]: Analyzing trace with hash 624876916, now seen corresponding path program 44 times [2021-08-21 11:58:58,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:58,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990391579] [2021-08-21 11:58:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:58,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:58:58,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:58,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990391579] [2021-08-21 11:58:58,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990391579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:58,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504438001] [2021-08-21 11:58:58,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:58,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:58,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:58,795 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 11:58:58,796 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 11:58:59,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:59,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:59,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:58:59,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:58:59,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504438001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:59,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:59,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 11:58:59,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325015590] [2021-08-21 11:58:59,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:59,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:59,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:59,915 INFO L87 Difference]: Start difference. First operand 10253 states and 24645 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:00,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:00,048 INFO L93 Difference]: Finished difference Result 9582 states and 22134 transitions. [2021-08-21 11:59:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:59:00,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 11:59:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:00,064 INFO L225 Difference]: With dead ends: 9582 [2021-08-21 11:59:00,064 INFO L226 Difference]: Without dead ends: 9546 [2021-08-21 11:59:00,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:59:00,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2021-08-21 11:59:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8819. [2021-08-21 11:59:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.325243819460195) internal successors, (20504), 8818 states have internal predecessors, (20504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:00,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20504 transitions. [2021-08-21 11:59:00,252 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20504 transitions. Word has length 35 [2021-08-21 11:59:00,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:00,252 INFO L470 AbstractCegarLoop]: Abstraction has 8819 states and 20504 transitions. [2021-08-21 11:59:00,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20504 transitions. [2021-08-21 11:59:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:00,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:00,261 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:00,282 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 11:59:00,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 11:59:00,462 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:00,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1797123837, now seen corresponding path program 45 times [2021-08-21 11:59:00,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:00,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245393870] [2021-08-21 11:59:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:00,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:00,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:00,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245393870] [2021-08-21 11:59:00,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245393870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:00,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831933537] [2021-08-21 11:59:00,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:00,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:00,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:00,503 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 11:59:00,516 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 11:59:01,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:59:01,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:01,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:59:01,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:01,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831933537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:01,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:01,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:01,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392703662] [2021-08-21 11:59:01,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:01,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:01,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:01,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:01,637 INFO L87 Difference]: Start difference. First operand 8819 states and 20504 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:01,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:01,716 INFO L93 Difference]: Finished difference Result 9119 states and 20973 transitions. [2021-08-21 11:59:01,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:01,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 11:59:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:01,730 INFO L225 Difference]: With dead ends: 9119 [2021-08-21 11:59:01,730 INFO L226 Difference]: Without dead ends: 9116 [2021-08-21 11:59:01,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:01,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9116 states. [2021-08-21 11:59:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9116 to 8819. [2021-08-21 11:59:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.3236561578589248) internal successors, (20490), 8818 states have internal predecessors, (20490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20490 transitions. [2021-08-21 11:59:01,848 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20490 transitions. Word has length 35 [2021-08-21 11:59:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:01,848 INFO L470 AbstractCegarLoop]: Abstraction has 8819 states and 20490 transitions. [2021-08-21 11:59:01,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20490 transitions. [2021-08-21 11:59:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:01,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:01,856 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:01,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 11:59:02,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:02,058 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:02,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:02,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1054481819, now seen corresponding path program 46 times [2021-08-21 11:59:02,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:02,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331591059] [2021-08-21 11:59:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:02,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:02,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:02,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331591059] [2021-08-21 11:59:02,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331591059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:02,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353978278] [2021-08-21 11:59:02,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:02,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:02,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:02,096 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 11:59:02,096 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 11:59:03,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:03,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:03,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:59:03,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 11:59:03,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353978278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:03,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:03,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:03,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594107065] [2021-08-21 11:59:03,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:03,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:03,240 INFO L87 Difference]: Start difference. First operand 8819 states and 20490 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:03,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:03,323 INFO L93 Difference]: Finished difference Result 11397 states and 26274 transitions. [2021-08-21 11:59:03,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:03,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 11:59:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:03,344 INFO L225 Difference]: With dead ends: 11397 [2021-08-21 11:59:03,344 INFO L226 Difference]: Without dead ends: 11397 [2021-08-21 11:59:03,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11397 states. [2021-08-21 11:59:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11397 to 10697. [2021-08-21 11:59:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 10696 states have (on average 2.343025430067315) internal successors, (25061), 10696 states have internal predecessors, (25061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 25061 transitions. [2021-08-21 11:59:03,501 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 25061 transitions. Word has length 35 [2021-08-21 11:59:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:03,502 INFO L470 AbstractCegarLoop]: Abstraction has 10697 states and 25061 transitions. [2021-08-21 11:59:03,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 25061 transitions. [2021-08-21 11:59:03,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:03,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:03,510 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:03,531 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 11:59:03,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 11:59:03,711 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1731536451, now seen corresponding path program 47 times [2021-08-21 11:59:03,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:03,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906332255] [2021-08-21 11:59:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:03,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:03,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:03,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906332255] [2021-08-21 11:59:03,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906332255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:03,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463019014] [2021-08-21 11:59:03,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:03,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:03,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:03,743 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 11:59:03,766 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 11:59:04,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:59:04,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:04,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:59:04,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:59:04,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463019014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:04,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:04,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:04,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808006518] [2021-08-21 11:59:04,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:04,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:04,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:04,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:04,886 INFO L87 Difference]: Start difference. First operand 10697 states and 25061 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:04,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:04,971 INFO L93 Difference]: Finished difference Result 11244 states and 25951 transitions. [2021-08-21 11:59:04,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:04,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 11:59:04,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:04,987 INFO L225 Difference]: With dead ends: 11244 [2021-08-21 11:59:04,987 INFO L226 Difference]: Without dead ends: 11238 [2021-08-21 11:59:04,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11238 states. [2021-08-21 11:59:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11238 to 9395. [2021-08-21 11:59:05,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 2.3070044709388973) internal successors, (21672), 9394 states have internal predecessors, (21672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 21672 transitions. [2021-08-21 11:59:05,116 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 21672 transitions. Word has length 35 [2021-08-21 11:59:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:05,117 INFO L470 AbstractCegarLoop]: Abstraction has 9395 states and 21672 transitions. [2021-08-21 11:59:05,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 21672 transitions. [2021-08-21 11:59:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:05,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:05,124 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:05,143 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 11:59:05,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 11:59:05,325 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:05,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:05,325 INFO L82 PathProgramCache]: Analyzing trace with hash 93963995, now seen corresponding path program 48 times [2021-08-21 11:59:05,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:05,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166592397] [2021-08-21 11:59:05,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:05,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:05,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:05,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166592397] [2021-08-21 11:59:05,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166592397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:05,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67712424] [2021-08-21 11:59:05,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:05,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:05,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:05,379 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 11:59:05,380 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 11:59:06,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:59:06,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:06,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:59:06,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:06,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67712424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:06,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:06,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 11:59:06,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023646641] [2021-08-21 11:59:06,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:06,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:06,524 INFO L87 Difference]: Start difference. First operand 9395 states and 21672 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:06,624 INFO L93 Difference]: Finished difference Result 9906 states and 22502 transitions. [2021-08-21 11:59:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:06,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 11:59:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:06,638 INFO L225 Difference]: With dead ends: 9906 [2021-08-21 11:59:06,638 INFO L226 Difference]: Without dead ends: 9894 [2021-08-21 11:59:06,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9894 states. [2021-08-21 11:59:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9894 to 9398. [2021-08-21 11:59:06,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.2974353517079917) internal successors, (21589), 9397 states have internal predecessors, (21589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21589 transitions. [2021-08-21 11:59:06,751 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21589 transitions. Word has length 35 [2021-08-21 11:59:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:06,751 INFO L470 AbstractCegarLoop]: Abstraction has 9398 states and 21589 transitions. [2021-08-21 11:59:06,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21589 transitions. [2021-08-21 11:59:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:06,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:06,758 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:06,777 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 11:59:06,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:06,959 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:06,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:06,959 INFO L82 PathProgramCache]: Analyzing trace with hash 597431527, now seen corresponding path program 49 times [2021-08-21 11:59:06,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:06,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990834782] [2021-08-21 11:59:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:06,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:06,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:06,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990834782] [2021-08-21 11:59:06,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990834782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:06,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472899237] [2021-08-21 11:59:06,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:06,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:06,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:07,000 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 11:59:07,005 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 11:59:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:59:08,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 11:59:08,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472899237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:08,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:08,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 11:59:08,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918048943] [2021-08-21 11:59:08,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:08,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:08,164 INFO L87 Difference]: Start difference. First operand 9398 states and 21589 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:08,255 INFO L93 Difference]: Finished difference Result 10139 states and 22898 transitions. [2021-08-21 11:59:08,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:08,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 11:59:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:08,269 INFO L225 Difference]: With dead ends: 10139 [2021-08-21 11:59:08,269 INFO L226 Difference]: Without dead ends: 10139 [2021-08-21 11:59:08,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10139 states. [2021-08-21 11:59:08,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10139 to 9398. [2021-08-21 11:59:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.295200595934873) internal successors, (21568), 9397 states have internal predecessors, (21568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:08,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21568 transitions. [2021-08-21 11:59:08,401 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21568 transitions. Word has length 35 [2021-08-21 11:59:08,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:08,401 INFO L470 AbstractCegarLoop]: Abstraction has 9398 states and 21568 transitions. [2021-08-21 11:59:08,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21568 transitions. [2021-08-21 11:59:08,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:08,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:08,410 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:08,429 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 11:59:08,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:08,610 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:08,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1359790695, now seen corresponding path program 50 times [2021-08-21 11:59:08,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:08,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44511086] [2021-08-21 11:59:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:08,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:08,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:08,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44511086] [2021-08-21 11:59:08,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44511086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:08,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723662250] [2021-08-21 11:59:08,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:08,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:08,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:08,654 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 11:59:08,655 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 11:59:09,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:09,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:09,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:59:09,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:09,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723662250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:09,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:09,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:09,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217491846] [2021-08-21 11:59:09,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:09,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:09,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:09,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:09,832 INFO L87 Difference]: Start difference. First operand 9398 states and 21568 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 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 11:59:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:09,922 INFO L93 Difference]: Finished difference Result 11101 states and 25290 transitions. [2021-08-21 11:59:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:09,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 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 35 [2021-08-21 11:59:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:09,940 INFO L225 Difference]: With dead ends: 11101 [2021-08-21 11:59:09,940 INFO L226 Difference]: Without dead ends: 11101 [2021-08-21 11:59:09,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2021-08-21 11:59:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 10511. [2021-08-21 11:59:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.312464319695528) internal successors, (24304), 10510 states have internal predecessors, (24304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24304 transitions. [2021-08-21 11:59:10,083 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24304 transitions. Word has length 35 [2021-08-21 11:59:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:10,083 INFO L470 AbstractCegarLoop]: Abstraction has 10511 states and 24304 transitions. [2021-08-21 11:59:10,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 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 11:59:10,083 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24304 transitions. [2021-08-21 11:59:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:10,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:10,091 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:10,111 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 11:59:10,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:10,292 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:10,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:10,292 INFO L82 PathProgramCache]: Analyzing trace with hash -682736063, now seen corresponding path program 51 times [2021-08-21 11:59:10,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:10,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332090860] [2021-08-21 11:59:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:10,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:10,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:10,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332090860] [2021-08-21 11:59:10,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332090860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:10,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467561017] [2021-08-21 11:59:10,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:10,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:10,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:10,324 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 11:59:10,324 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 11:59:11,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:59:11,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:11,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:59:11,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:11,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467561017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:11,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:11,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:59:11,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748191305] [2021-08-21 11:59:11,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:11,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:11,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:11,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:11,468 INFO L87 Difference]: Start difference. First operand 10511 states and 24304 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 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 11:59:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:11,575 INFO L93 Difference]: Finished difference Result 11074 states and 25227 transitions. [2021-08-21 11:59:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:11,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 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 35 [2021-08-21 11:59:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:11,589 INFO L225 Difference]: With dead ends: 11074 [2021-08-21 11:59:11,589 INFO L226 Difference]: Without dead ends: 11071 [2021-08-21 11:59:11,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2021-08-21 11:59:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 10511. [2021-08-21 11:59:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3117031398667933) internal successors, (24296), 10510 states have internal predecessors, (24296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24296 transitions. [2021-08-21 11:59:11,724 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24296 transitions. Word has length 35 [2021-08-21 11:59:11,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:11,724 INFO L470 AbstractCegarLoop]: Abstraction has 10511 states and 24296 transitions. [2021-08-21 11:59:11,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 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 11:59:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24296 transitions. [2021-08-21 11:59:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:11,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:11,732 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:11,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 11:59:11,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 11:59:11,933 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:11,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1974658777, now seen corresponding path program 52 times [2021-08-21 11:59:11,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:11,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669803523] [2021-08-21 11:59:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:11,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:11,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:11,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669803523] [2021-08-21 11:59:11,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669803523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:11,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084513818] [2021-08-21 11:59:11,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:11,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:11,969 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 11:59:11,969 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 11:59:13,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:13,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:59:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:13,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084513818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:13,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:13,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:59:13,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102342037] [2021-08-21 11:59:13,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:13,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:13,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:13,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:13,121 INFO L87 Difference]: Start difference. First operand 10511 states and 24296 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 11:59:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:13,220 INFO L93 Difference]: Finished difference Result 11098 states and 25265 transitions. [2021-08-21 11:59:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:13,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 35 [2021-08-21 11:59:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:13,234 INFO L225 Difference]: With dead ends: 11098 [2021-08-21 11:59:13,234 INFO L226 Difference]: Without dead ends: 11086 [2021-08-21 11:59:13,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11086 states. [2021-08-21 11:59:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11086 to 10511. [2021-08-21 11:59:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3078972407231206) internal successors, (24256), 10510 states have internal predecessors, (24256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:13,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24256 transitions. [2021-08-21 11:59:13,400 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24256 transitions. Word has length 35 [2021-08-21 11:59:13,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:13,401 INFO L470 AbstractCegarLoop]: Abstraction has 10511 states and 24256 transitions. [2021-08-21 11:59:13,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 11:59:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24256 transitions. [2021-08-21 11:59:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:13,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:13,410 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:13,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 11:59:13,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 11:59:13,610 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:13,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:13,610 INFO L82 PathProgramCache]: Analyzing trace with hash 919304957, now seen corresponding path program 53 times [2021-08-21 11:59:13,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:13,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506352200] [2021-08-21 11:59:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:13,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:13,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:13,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506352200] [2021-08-21 11:59:13,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506352200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:13,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928769942] [2021-08-21 11:59:13,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:13,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:13,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:13,647 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 11:59:13,647 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 11:59:14,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:59:14,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:59:14,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:14,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928769942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:14,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:14,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 11:59:14,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869577584] [2021-08-21 11:59:14,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:14,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:14,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:14,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:14,816 INFO L87 Difference]: Start difference. First operand 10511 states and 24256 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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 11:59:14,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:14,923 INFO L93 Difference]: Finished difference Result 11062 states and 25159 transitions. [2021-08-21 11:59:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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 35 [2021-08-21 11:59:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:14,939 INFO L225 Difference]: With dead ends: 11062 [2021-08-21 11:59:14,939 INFO L226 Difference]: Without dead ends: 11039 [2021-08-21 11:59:14,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:14,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11039 states. [2021-08-21 11:59:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11039 to 10526. [2021-08-21 11:59:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10526 states, 10525 states have (on average 2.3065083135391924) internal successors, (24276), 10525 states have internal predecessors, (24276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10526 states to 10526 states and 24276 transitions. [2021-08-21 11:59:15,097 INFO L78 Accepts]: Start accepts. Automaton has 10526 states and 24276 transitions. Word has length 35 [2021-08-21 11:59:15,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:15,097 INFO L470 AbstractCegarLoop]: Abstraction has 10526 states and 24276 transitions. [2021-08-21 11:59:15,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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 11:59:15,097 INFO L276 IsEmpty]: Start isEmpty. Operand 10526 states and 24276 transitions. [2021-08-21 11:59:15,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 11:59:15,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:15,105 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:15,123 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 11:59:15,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 11:59:15,305 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:15,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1950952414, now seen corresponding path program 6 times [2021-08-21 11:59:15,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:15,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476453421] [2021-08-21 11:59:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:15,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:15,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:15,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476453421] [2021-08-21 11:59:15,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476453421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:15,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928365651] [2021-08-21 11:59:15,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:15,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:15,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:15,358 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 11:59:15,358 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 11:59:16,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 11:59:16,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:16,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:59:16,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:16,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928365651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:16,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:16,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 11:59:16,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294641064] [2021-08-21 11:59:16,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:59:16,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:16,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:59:16,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:16,550 INFO L87 Difference]: Start difference. First operand 10526 states and 24276 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:16,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:16,692 INFO L93 Difference]: Finished difference Result 11977 states and 27126 transitions. [2021-08-21 11:59:16,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:16,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 11:59:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:16,708 INFO L225 Difference]: With dead ends: 11977 [2021-08-21 11:59:16,709 INFO L226 Difference]: Without dead ends: 11977 [2021-08-21 11:59:16,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:59:16,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11977 states. [2021-08-21 11:59:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11977 to 10813. [2021-08-21 11:59:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 10812 states have (on average 2.3063263041065483) internal successors, (24936), 10812 states have internal predecessors, (24936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 24936 transitions. [2021-08-21 11:59:16,881 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 24936 transitions. Word has length 36 [2021-08-21 11:59:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:16,881 INFO L470 AbstractCegarLoop]: Abstraction has 10813 states and 24936 transitions. [2021-08-21 11:59:16,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 24936 transitions. [2021-08-21 11:59:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:16,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:16,891 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:16,910 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 11:59:17,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:17,091 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:17,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1808077410, now seen corresponding path program 54 times [2021-08-21 11:59:17,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:17,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84727227] [2021-08-21 11:59:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:17,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:17,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:17,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84727227] [2021-08-21 11:59:17,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84727227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:17,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363241365] [2021-08-21 11:59:17,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:17,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:17,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:17,286 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 11:59:17,286 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 11:59:18,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:59:18,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:18,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:18,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363241365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:18,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:18,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 11:59:18,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152025627] [2021-08-21 11:59:18,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:59:18,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:18,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:59:18,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:59:18,792 INFO L87 Difference]: Start difference. First operand 10813 states and 24936 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:19,471 INFO L93 Difference]: Finished difference Result 11896 states and 27360 transitions. [2021-08-21 11:59:19,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:59:19,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 11:59:19,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:19,488 INFO L225 Difference]: With dead ends: 11896 [2021-08-21 11:59:19,488 INFO L226 Difference]: Without dead ends: 11879 [2021-08-21 11:59:19,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 11:59:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2021-08-21 11:59:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 11426. [2021-08-21 11:59:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11426 states, 11425 states have (on average 2.312910284463895) internal successors, (26425), 11425 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11426 states to 11426 states and 26425 transitions. [2021-08-21 11:59:19,654 INFO L78 Accepts]: Start accepts. Automaton has 11426 states and 26425 transitions. Word has length 38 [2021-08-21 11:59:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:19,654 INFO L470 AbstractCegarLoop]: Abstraction has 11426 states and 26425 transitions. [2021-08-21 11:59:19,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 11426 states and 26425 transitions. [2021-08-21 11:59:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:19,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:19,664 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:19,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 11:59:19,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:19,865 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:19,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash 283993190, now seen corresponding path program 55 times [2021-08-21 11:59:19,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:19,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872765572] [2021-08-21 11:59:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:19,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:20,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:20,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872765572] [2021-08-21 11:59:20,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872765572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:20,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381616152] [2021-08-21 11:59:20,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:20,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:20,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:20,070 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 11:59:20,071 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 11:59:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:21,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:21,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:21,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381616152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:21,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:21,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 11:59:21,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150556369] [2021-08-21 11:59:21,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:59:21,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:21,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:59:21,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:59:21,657 INFO L87 Difference]: Start difference. First operand 11426 states and 26425 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:22,241 INFO L93 Difference]: Finished difference Result 12194 states and 28106 transitions. [2021-08-21 11:59:22,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:59:22,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 11:59:22,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:22,259 INFO L225 Difference]: With dead ends: 12194 [2021-08-21 11:59:22,259 INFO L226 Difference]: Without dead ends: 12177 [2021-08-21 11:59:22,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:59:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-08-21 11:59:22,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 11804. [2021-08-21 11:59:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11804 states, 11803 states have (on average 2.3180547318478353) internal successors, (27360), 11803 states have internal predecessors, (27360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11804 states to 11804 states and 27360 transitions. [2021-08-21 11:59:22,396 INFO L78 Accepts]: Start accepts. Automaton has 11804 states and 27360 transitions. Word has length 38 [2021-08-21 11:59:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:22,396 INFO L470 AbstractCegarLoop]: Abstraction has 11804 states and 27360 transitions. [2021-08-21 11:59:22,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 11804 states and 27360 transitions. [2021-08-21 11:59:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:22,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:22,407 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:22,426 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 11:59:22,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 11:59:22,607 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:22,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:22,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2130240098, now seen corresponding path program 56 times [2021-08-21 11:59:22,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:22,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730513497] [2021-08-21 11:59:22,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:22,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:22,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:22,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730513497] [2021-08-21 11:59:22,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730513497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:22,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880990058] [2021-08-21 11:59:22,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:22,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:22,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:22,811 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 11:59:22,811 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 11:59:24,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:24,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:24,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:24,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880990058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:24,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:24,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 11:59:24,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391522113] [2021-08-21 11:59:24,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:59:24,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:24,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:59:24,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:59:24,424 INFO L87 Difference]: Start difference. First operand 11804 states and 27360 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:25,037 INFO L93 Difference]: Finished difference Result 12640 states and 29196 transitions. [2021-08-21 11:59:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:59:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 11:59:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:25,055 INFO L225 Difference]: With dead ends: 12640 [2021-08-21 11:59:25,055 INFO L226 Difference]: Without dead ends: 12623 [2021-08-21 11:59:25,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 496.5ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:59:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2021-08-21 11:59:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 12181. [2021-08-21 11:59:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 12180 states have (on average 2.3230706075533663) internal successors, (28295), 12180 states have internal predecessors, (28295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 28295 transitions. [2021-08-21 11:59:25,208 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 28295 transitions. Word has length 38 [2021-08-21 11:59:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:25,208 INFO L470 AbstractCegarLoop]: Abstraction has 12181 states and 28295 transitions. [2021-08-21 11:59:25,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 28295 transitions. [2021-08-21 11:59:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:25,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:25,218 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:25,237 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 11:59:25,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 11:59:25,419 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:25,419 INFO L82 PathProgramCache]: Analyzing trace with hash 726839142, now seen corresponding path program 57 times [2021-08-21 11:59:25,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:25,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874966654] [2021-08-21 11:59:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:25,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:25,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:25,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874966654] [2021-08-21 11:59:25,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874966654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:25,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179343988] [2021-08-21 11:59:25,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:25,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:25,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:25,614 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 11:59:25,615 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 11:59:26,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:59:26,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:26,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:26,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:27,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179343988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:27,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:27,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 11:59:27,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255869600] [2021-08-21 11:59:27,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 11:59:27,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:27,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 11:59:27,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:59:27,276 INFO L87 Difference]: Start difference. First operand 12181 states and 28295 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:28,198 INFO L93 Difference]: Finished difference Result 15043 states and 34569 transitions. [2021-08-21 11:59:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:59:28,199 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 11:59:28,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:28,220 INFO L225 Difference]: With dead ends: 15043 [2021-08-21 11:59:28,221 INFO L226 Difference]: Without dead ends: 15009 [2021-08-21 11:59:28,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 640.2ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:59:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15009 states. [2021-08-21 11:59:28,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15009 to 12800. [2021-08-21 11:59:28,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12800 states, 12799 states have (on average 2.3282287678724902) internal successors, (29799), 12799 states have internal predecessors, (29799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 29799 transitions. [2021-08-21 11:59:28,454 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 29799 transitions. Word has length 38 [2021-08-21 11:59:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:28,454 INFO L470 AbstractCegarLoop]: Abstraction has 12800 states and 29799 transitions. [2021-08-21 11:59:28,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 29799 transitions. [2021-08-21 11:59:28,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:28,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:28,464 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:28,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:28,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:28,664 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:28,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1924591970, now seen corresponding path program 58 times [2021-08-21 11:59:28,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:28,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188479558] [2021-08-21 11:59:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:28,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:28,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:28,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188479558] [2021-08-21 11:59:28,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188479558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:28,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503938619] [2021-08-21 11:59:28,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:28,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:28,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:28,879 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 11:59:28,881 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 11:59:30,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:30,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:30,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:30,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:30,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503938619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:30,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:30,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 11:59:30,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615526544] [2021-08-21 11:59:30,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 11:59:30,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:30,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 11:59:30,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:59:30,578 INFO L87 Difference]: Start difference. First operand 12800 states and 29799 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:31,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:31,102 INFO L93 Difference]: Finished difference Result 14047 states and 32541 transitions. [2021-08-21 11:59:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 11:59:31,102 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 11:59:31,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:31,123 INFO L225 Difference]: With dead ends: 14047 [2021-08-21 11:59:31,123 INFO L226 Difference]: Without dead ends: 14013 [2021-08-21 11:59:31,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:59:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14013 states. [2021-08-21 11:59:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14013 to 13526. [2021-08-21 11:59:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13526 states, 13525 states have (on average 2.3326432532347505) internal successors, (31549), 13525 states have internal predecessors, (31549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13526 states to 13526 states and 31549 transitions. [2021-08-21 11:59:31,297 INFO L78 Accepts]: Start accepts. Automaton has 13526 states and 31549 transitions. Word has length 38 [2021-08-21 11:59:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:31,297 INFO L470 AbstractCegarLoop]: Abstraction has 13526 states and 31549 transitions. [2021-08-21 11:59:31,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:31,297 INFO L276 IsEmpty]: Start isEmpty. Operand 13526 states and 31549 transitions. [2021-08-21 11:59:31,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:31,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:31,308 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:31,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 11:59:31,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 11:59:31,508 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:31,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1690483302, now seen corresponding path program 59 times [2021-08-21 11:59:31,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:31,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449095624] [2021-08-21 11:59:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:31,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:31,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:31,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449095624] [2021-08-21 11:59:31,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449095624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:31,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470280292] [2021-08-21 11:59:31,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:31,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:31,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:31,701 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 11:59:31,701 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 11:59:32,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 11:59:32,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:32,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:33,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470280292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:33,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:33,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 11:59:33,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692105568] [2021-08-21 11:59:33,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 11:59:33,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:33,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 11:59:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:59:33,488 INFO L87 Difference]: Start difference. First operand 13526 states and 31549 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 11:59:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:34,082 INFO L93 Difference]: Finished difference Result 16913 states and 39161 transitions. [2021-08-21 11:59:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 11:59:34,082 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) Word has length 38 [2021-08-21 11:59:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:34,107 INFO L225 Difference]: With dead ends: 16913 [2021-08-21 11:59:34,108 INFO L226 Difference]: Without dead ends: 16870 [2021-08-21 11:59:34,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 496.6ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 11:59:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16870 states. [2021-08-21 11:59:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16870 to 15557. [2021-08-21 11:59:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15557 states, 15556 states have (on average 2.3482257649781433) internal successors, (36529), 15556 states have internal predecessors, (36529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15557 states to 15557 states and 36529 transitions. [2021-08-21 11:59:34,324 INFO L78 Accepts]: Start accepts. Automaton has 15557 states and 36529 transitions. Word has length 38 [2021-08-21 11:59:34,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:34,324 INFO L470 AbstractCegarLoop]: Abstraction has 15557 states and 36529 transitions. [2021-08-21 11:59:34,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 11:59:34,324 INFO L276 IsEmpty]: Start isEmpty. Operand 15557 states and 36529 transitions. [2021-08-21 11:59:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:34,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:34,335 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:34,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 11:59:34,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 11:59:34,537 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash -278522014, now seen corresponding path program 60 times [2021-08-21 11:59:34,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:34,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844042295] [2021-08-21 11:59:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:34,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:34,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:34,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844042295] [2021-08-21 11:59:34,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844042295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:34,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266623677] [2021-08-21 11:59:34,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:34,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:34,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:34,785 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 11:59:34,785 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 11:59:36,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:59:36,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:36,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:36,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:36,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266623677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:36,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:36,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 11:59:36,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948551620] [2021-08-21 11:59:36,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:59:36,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:36,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:59:36,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:59:36,559 INFO L87 Difference]: Start difference. First operand 15557 states and 36529 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:37,170 INFO L93 Difference]: Finished difference Result 16313 states and 38191 transitions. [2021-08-21 11:59:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:59:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 11:59:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:37,198 INFO L225 Difference]: With dead ends: 16313 [2021-08-21 11:59:37,198 INFO L226 Difference]: Without dead ends: 16296 [2021-08-21 11:59:37,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 521.4ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:59:37,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-08-21 11:59:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 15947. [2021-08-21 11:59:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15947 states, 15946 states have (on average 2.3511225385676657) internal successors, (37491), 15946 states have internal predecessors, (37491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15947 states to 15947 states and 37491 transitions. [2021-08-21 11:59:37,421 INFO L78 Accepts]: Start accepts. Automaton has 15947 states and 37491 transitions. Word has length 38 [2021-08-21 11:59:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:37,421 INFO L470 AbstractCegarLoop]: Abstraction has 15947 states and 37491 transitions. [2021-08-21 11:59:37,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:37,421 INFO L276 IsEmpty]: Start isEmpty. Operand 15947 states and 37491 transitions. [2021-08-21 11:59:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:37,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:37,433 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:37,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:37,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 11:59:37,634 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:37,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:37,634 INFO L82 PathProgramCache]: Analyzing trace with hash -100519944, now seen corresponding path program 61 times [2021-08-21 11:59:37,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:37,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085965273] [2021-08-21 11:59:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:37,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:37,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:37,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085965273] [2021-08-21 11:59:37,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085965273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:37,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75048140] [2021-08-21 11:59:37,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:37,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:37,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:37,895 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 11:59:37,897 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 11:59:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:39,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:39,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75048140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:39,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:39,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 11:59:39,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76116905] [2021-08-21 11:59:39,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:59:39,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:39,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:59:39,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:59:39,643 INFO L87 Difference]: Start difference. First operand 15947 states and 37491 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:40,212 INFO L93 Difference]: Finished difference Result 16694 states and 39131 transitions. [2021-08-21 11:59:40,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:59:40,212 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 11:59:40,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:40,236 INFO L225 Difference]: With dead ends: 16694 [2021-08-21 11:59:40,236 INFO L226 Difference]: Without dead ends: 16677 [2021-08-21 11:59:40,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 464.1ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:59:40,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16677 states. [2021-08-21 11:59:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16677 to 16317. [2021-08-21 11:59:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16317 states, 16316 states have (on average 2.3539470458445697) internal successors, (38407), 16316 states have internal predecessors, (38407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16317 states to 16317 states and 38407 transitions. [2021-08-21 11:59:40,477 INFO L78 Accepts]: Start accepts. Automaton has 16317 states and 38407 transitions. Word has length 38 [2021-08-21 11:59:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:40,477 INFO L470 AbstractCegarLoop]: Abstraction has 16317 states and 38407 transitions. [2021-08-21 11:59:40,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 16317 states and 38407 transitions. [2021-08-21 11:59:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:40,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:40,489 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:40,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 11:59:40,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 11:59:40,689 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1095467792, now seen corresponding path program 62 times [2021-08-21 11:59:40,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:40,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975549323] [2021-08-21 11:59:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:40,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:40,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:40,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975549323] [2021-08-21 11:59:40,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975549323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:40,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098594871] [2021-08-21 11:59:40,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:40,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:40,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:40,907 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 11:59:40,908 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 11:59:42,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:42,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:42,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:42,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:42,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098594871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:42,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:42,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 11:59:42,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480022450] [2021-08-21 11:59:42,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:59:42,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:42,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:59:42,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:59:42,718 INFO L87 Difference]: Start difference. First operand 16317 states and 38407 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:43,205 INFO L93 Difference]: Finished difference Result 16910 states and 39707 transitions. [2021-08-21 11:59:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:59:43,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 11:59:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:43,228 INFO L225 Difference]: With dead ends: 16910 [2021-08-21 11:59:43,228 INFO L226 Difference]: Without dead ends: 16893 [2021-08-21 11:59:43,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:59:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16893 states. [2021-08-21 11:59:43,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16893 to 16652. [2021-08-21 11:59:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16652 states, 16651 states have (on average 2.3558945408684164) internal successors, (39228), 16651 states have internal predecessors, (39228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16652 states to 16652 states and 39228 transitions. [2021-08-21 11:59:43,449 INFO L78 Accepts]: Start accepts. Automaton has 16652 states and 39228 transitions. Word has length 38 [2021-08-21 11:59:43,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:43,449 INFO L470 AbstractCegarLoop]: Abstraction has 16652 states and 39228 transitions. [2021-08-21 11:59:43,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 16652 states and 39228 transitions. [2021-08-21 11:59:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:43,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:43,461 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:43,484 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 11:59:43,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:43,662 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:43,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1318765496, now seen corresponding path program 63 times [2021-08-21 11:59:43,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:43,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133432231] [2021-08-21 11:59:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:43,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:43,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:43,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133432231] [2021-08-21 11:59:43,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133432231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:43,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095343406] [2021-08-21 11:59:43,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:43,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:43,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:43,850 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 11:59:43,850 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 11:59:45,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 11:59:45,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:45,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:45,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:45,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095343406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:45,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:45,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 11:59:45,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190572872] [2021-08-21 11:59:45,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 11:59:45,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:45,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 11:59:45,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-08-21 11:59:45,827 INFO L87 Difference]: Start difference. First operand 16652 states and 39228 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:46,715 INFO L93 Difference]: Finished difference Result 18935 states and 44264 transitions. [2021-08-21 11:59:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 11:59:46,715 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 11:59:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:46,743 INFO L225 Difference]: With dead ends: 18935 [2021-08-21 11:59:46,743 INFO L226 Difference]: Without dead ends: 18918 [2021-08-21 11:59:46,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 689.5ms TimeCoverageRelationStatistics Valid=155, Invalid=1567, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:59:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18918 states. [2021-08-21 11:59:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18918 to 17289. [2021-08-21 11:59:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17289 states, 17288 states have (on average 2.3604812586765385) internal successors, (40808), 17288 states have internal predecessors, (40808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17289 states to 17289 states and 40808 transitions. [2021-08-21 11:59:47,051 INFO L78 Accepts]: Start accepts. Automaton has 17289 states and 40808 transitions. Word has length 38 [2021-08-21 11:59:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:47,051 INFO L470 AbstractCegarLoop]: Abstraction has 17289 states and 40808 transitions. [2021-08-21 11:59:47,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:47,051 INFO L276 IsEmpty]: Start isEmpty. Operand 17289 states and 40808 transitions. [2021-08-21 11:59:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:47,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:47,063 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:47,086 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 11:59:47,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:47,283 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:47,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:47,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1113117368, now seen corresponding path program 64 times [2021-08-21 11:59:47,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:47,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586093029] [2021-08-21 11:59:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:47,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:47,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:47,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586093029] [2021-08-21 11:59:47,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586093029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:47,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718857426] [2021-08-21 11:59:47,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:47,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:47,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:47,480 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 11:59:47,481 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 11:59:48,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:48,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:48,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:48,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:49,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718857426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:49,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:49,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 11:59:49,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534856515] [2021-08-21 11:59:49,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 11:59:49,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:49,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 11:59:49,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:59:49,361 INFO L87 Difference]: Start difference. First operand 17289 states and 40808 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:49,951 INFO L93 Difference]: Finished difference Result 17863 states and 42004 transitions. [2021-08-21 11:59:49,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:59:49,952 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 11:59:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:49,977 INFO L225 Difference]: With dead ends: 17863 [2021-08-21 11:59:49,977 INFO L226 Difference]: Without dead ends: 17829 [2021-08-21 11:59:49,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 474.5ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 11:59:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17829 states. [2021-08-21 11:59:50,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17829 to 17547. [2021-08-21 11:59:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17547 states, 17546 states have (on average 2.358828222956799) internal successors, (41388), 17546 states have internal predecessors, (41388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17547 states to 17547 states and 41388 transitions. [2021-08-21 11:59:50,208 INFO L78 Accepts]: Start accepts. Automaton has 17547 states and 41388 transitions. Word has length 38 [2021-08-21 11:59:50,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:50,208 INFO L470 AbstractCegarLoop]: Abstraction has 17547 states and 41388 transitions. [2021-08-21 11:59:50,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:50,209 INFO L276 IsEmpty]: Start isEmpty. Operand 17547 states and 41388 transitions. [2021-08-21 11:59:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:50,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:50,221 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:50,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:50,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:50,421 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:50,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:50,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1793009392, now seen corresponding path program 65 times [2021-08-21 11:59:50,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:50,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570249412] [2021-08-21 11:59:50,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:50,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:50,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:50,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570249412] [2021-08-21 11:59:50,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570249412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:50,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550128499] [2021-08-21 11:59:50,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:50,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:50,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:50,614 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 11:59:50,614 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 11:59:52,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 11:59:52,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:52,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:52,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:52,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550128499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:52,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:52,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 11:59:52,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833041967] [2021-08-21 11:59:52,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 11:59:52,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:52,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 11:59:52,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:59:52,605 INFO L87 Difference]: Start difference. First operand 17547 states and 41388 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 11:59:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:53,199 INFO L93 Difference]: Finished difference Result 20211 states and 47310 transitions. [2021-08-21 11:59:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 11:59:53,203 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) Word has length 38 [2021-08-21 11:59:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:53,232 INFO L225 Difference]: With dead ends: 20211 [2021-08-21 11:59:53,232 INFO L226 Difference]: Without dead ends: 20168 [2021-08-21 11:59:53,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:59:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20168 states. [2021-08-21 11:59:53,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20168 to 18863. [2021-08-21 11:59:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18863 states, 18862 states have (on average 2.360089067967342) internal successors, (44516), 18862 states have internal predecessors, (44516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18863 states to 18863 states and 44516 transitions. [2021-08-21 11:59:53,491 INFO L78 Accepts]: Start accepts. Automaton has 18863 states and 44516 transitions. Word has length 38 [2021-08-21 11:59:53,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:53,491 INFO L470 AbstractCegarLoop]: Abstraction has 18863 states and 44516 transitions. [2021-08-21 11:59:53,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 11:59:53,491 INFO L276 IsEmpty]: Start isEmpty. Operand 18863 states and 44516 transitions. [2021-08-21 11:59:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:53,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:53,504 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:53,524 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 11:59:53,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-21 11:59:53,705 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash 532952588, now seen corresponding path program 66 times [2021-08-21 11:59:53,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:53,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788517237] [2021-08-21 11:59:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:53,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:53,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:53,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788517237] [2021-08-21 11:59:53,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788517237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:53,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316015534] [2021-08-21 11:59:53,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:53,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:53,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:53,955 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 11:59:53,958 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 11:59:55,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:59:55,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:55,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:55,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:55,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316015534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:55,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:55,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 11:59:55,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822476453] [2021-08-21 11:59:55,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:59:55,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:55,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:59:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:59:55,922 INFO L87 Difference]: Start difference. First operand 18863 states and 44516 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:56,563 INFO L93 Difference]: Finished difference Result 19446 states and 45799 transitions. [2021-08-21 11:59:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:59:56,565 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 11:59:56,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:56,597 INFO L225 Difference]: With dead ends: 19446 [2021-08-21 11:59:56,597 INFO L226 Difference]: Without dead ends: 19429 [2021-08-21 11:59:56,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:59:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19429 states. [2021-08-21 11:59:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19429 to 19214. [2021-08-21 11:59:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19214 states, 19213 states have (on average 2.3614219538853902) internal successors, (45370), 19213 states have internal predecessors, (45370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19214 states to 19214 states and 45370 transitions. [2021-08-21 11:59:56,861 INFO L78 Accepts]: Start accepts. Automaton has 19214 states and 45370 transitions. Word has length 38 [2021-08-21 11:59:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:56,861 INFO L470 AbstractCegarLoop]: Abstraction has 19214 states and 45370 transitions. [2021-08-21 11:59:56,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 19214 states and 45370 transitions. [2021-08-21 11:59:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 11:59:56,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:56,875 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:56,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 11:59:57,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:57,075 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:57,076 INFO L82 PathProgramCache]: Analyzing trace with hash 710954658, now seen corresponding path program 67 times [2021-08-21 11:59:57,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:57,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854374484] [2021-08-21 11:59:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:57,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:57,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:57,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854374484] [2021-08-21 11:59:57,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854374484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:57,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944007929] [2021-08-21 11:59:57,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:57,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:57,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:57,281 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 11:59:57,281 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 11:59:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:58,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:59:58,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:59,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944007929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:59,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:59,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 11:59:59,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265274385] [2021-08-21 11:59:59,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:59:59,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:59,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:59:59,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:59:59,289 INFO L87 Difference]: Start difference. First operand 19214 states and 45370 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:59,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:59,781 INFO L93 Difference]: Finished difference Result 19790 states and 46635 transitions. [2021-08-21 11:59:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:59:59,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 11:59:59,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:59,812 INFO L225 Difference]: With dead ends: 19790 [2021-08-21 11:59:59,812 INFO L226 Difference]: Without dead ends: 19773 [2021-08-21 11:59:59,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:59:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19773 states. [2021-08-21 12:00:00,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19773 to 19545. [2021-08-21 12:00:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19545 states, 19544 states have (on average 2.362771182971756) internal successors, (46178), 19544 states have internal predecessors, (46178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19545 states to 19545 states and 46178 transitions. [2021-08-21 12:00:00,077 INFO L78 Accepts]: Start accepts. Automaton has 19545 states and 46178 transitions. Word has length 38 [2021-08-21 12:00:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:00,078 INFO L470 AbstractCegarLoop]: Abstraction has 19545 states and 46178 transitions. [2021-08-21 12:00:00,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:00,078 INFO L276 IsEmpty]: Start isEmpty. Operand 19545 states and 46178 transitions. [2021-08-21 12:00:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:00,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:00,092 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:00,113 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 12:00:00,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:00,292 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:00,293 INFO L82 PathProgramCache]: Analyzing trace with hash 432482470, now seen corresponding path program 68 times [2021-08-21 12:00:00,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:00,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17941854] [2021-08-21 12:00:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:00,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:00,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:00,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17941854] [2021-08-21 12:00:00,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17941854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:00,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936459295] [2021-08-21 12:00:00,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:00,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:00,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:00,535 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 12:00:00,537 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 12:00:02,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:02,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:02,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:02,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936459295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:02,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:02,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 12:00:02,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394062585] [2021-08-21 12:00:02,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:00:02,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:02,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:00:02,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:00:02,521 INFO L87 Difference]: Start difference. First operand 19545 states and 46178 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:03,148 INFO L93 Difference]: Finished difference Result 20173 states and 47556 transitions. [2021-08-21 12:00:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:00:03,148 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:00:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:03,179 INFO L225 Difference]: With dead ends: 20173 [2021-08-21 12:00:03,180 INFO L226 Difference]: Without dead ends: 20156 [2021-08-21 12:00:03,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:00:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20156 states. [2021-08-21 12:00:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20156 to 19862. [2021-08-21 12:00:03,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19862 states, 19861 states have (on average 2.3641307084235437) internal successors, (46954), 19861 states have internal predecessors, (46954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19862 states to 19862 states and 46954 transitions. [2021-08-21 12:00:03,461 INFO L78 Accepts]: Start accepts. Automaton has 19862 states and 46954 transitions. Word has length 38 [2021-08-21 12:00:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:03,461 INFO L470 AbstractCegarLoop]: Abstraction has 19862 states and 46954 transitions. [2021-08-21 12:00:03,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 19862 states and 46954 transitions. [2021-08-21 12:00:03,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:03,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:03,474 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:03,495 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 12:00:03,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 12:00:03,675 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:03,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:03,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1005405586, now seen corresponding path program 69 times [2021-08-21 12:00:03,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:03,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306477052] [2021-08-21 12:00:03,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:03,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:03,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:03,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306477052] [2021-08-21 12:00:03,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306477052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:03,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309050658] [2021-08-21 12:00:03,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:03,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:03,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:03,867 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 12:00:03,868 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 12:00:05,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:00:05,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:05,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:05,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:05,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309050658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:05,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:05,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 12:00:05,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740521067] [2021-08-21 12:00:05,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:00:05,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:05,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:00:05,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:00:05,989 INFO L87 Difference]: Start difference. First operand 19862 states and 46954 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:06,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:06,763 INFO L93 Difference]: Finished difference Result 20811 states and 49049 transitions. [2021-08-21 12:00:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:00:06,764 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:00:06,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:06,793 INFO L225 Difference]: With dead ends: 20811 [2021-08-21 12:00:06,793 INFO L226 Difference]: Without dead ends: 20777 [2021-08-21 12:00:06,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 532.4ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:00:06,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20777 states. [2021-08-21 12:00:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20777 to 20322. [2021-08-21 12:00:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20322 states, 20321 states have (on average 2.3653855617341666) internal successors, (48067), 20321 states have internal predecessors, (48067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20322 states to 20322 states and 48067 transitions. [2021-08-21 12:00:07,103 INFO L78 Accepts]: Start accepts. Automaton has 20322 states and 48067 transitions. Word has length 38 [2021-08-21 12:00:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:07,103 INFO L470 AbstractCegarLoop]: Abstraction has 20322 states and 48067 transitions. [2021-08-21 12:00:07,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 20322 states and 48067 transitions. [2021-08-21 12:00:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:07,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:07,117 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:07,137 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 12:00:07,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 12:00:07,317 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:07,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:07,318 INFO L82 PathProgramCache]: Analyzing trace with hash -41761426, now seen corresponding path program 70 times [2021-08-21 12:00:07,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:07,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034282037] [2021-08-21 12:00:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:07,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:07,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:07,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034282037] [2021-08-21 12:00:07,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034282037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:07,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973849538] [2021-08-21 12:00:07,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:07,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:07,506 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 12:00:07,507 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 12:00:09,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:09,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:09,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:09,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:09,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973849538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:09,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:09,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 12:00:09,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584543934] [2021-08-21 12:00:09,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:00:09,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:09,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:00:09,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:00:09,696 INFO L87 Difference]: Start difference. First operand 20322 states and 48067 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 12:00:10,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:10,352 INFO L93 Difference]: Finished difference Result 23109 states and 54288 transitions. [2021-08-21 12:00:10,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:00:10,353 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) Word has length 38 [2021-08-21 12:00:10,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:10,387 INFO L225 Difference]: With dead ends: 23109 [2021-08-21 12:00:10,387 INFO L226 Difference]: Without dead ends: 23066 [2021-08-21 12:00:10,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:00:10,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23066 states. [2021-08-21 12:00:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23066 to 21748. [2021-08-21 12:00:10,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21748 states, 21747 states have (on average 2.3661194647537593) internal successors, (51456), 21747 states have internal predecessors, (51456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21748 states to 21748 states and 51456 transitions. [2021-08-21 12:00:10,728 INFO L78 Accepts]: Start accepts. Automaton has 21748 states and 51456 transitions. Word has length 38 [2021-08-21 12:00:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:10,729 INFO L470 AbstractCegarLoop]: Abstraction has 21748 states and 51456 transitions. [2021-08-21 12:00:10,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 12:00:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 21748 states and 51456 transitions. [2021-08-21 12:00:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:10,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:10,744 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:10,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 12:00:10,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:10,945 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:10,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1121160064, now seen corresponding path program 71 times [2021-08-21 12:00:10,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:10,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794271852] [2021-08-21 12:00:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:10,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:11,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:11,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794271852] [2021-08-21 12:00:11,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794271852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:11,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230107632] [2021-08-21 12:00:11,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:11,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:11,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:11,145 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 12:00:11,146 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 12:00:12,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:00:12,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:12,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:12,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:13,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230107632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:13,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:13,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 12:00:13,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711253048] [2021-08-21 12:00:13,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:00:13,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:13,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:00:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:00:13,384 INFO L87 Difference]: Start difference. First operand 21748 states and 51456 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:14,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:14,147 INFO L93 Difference]: Finished difference Result 23617 states and 55513 transitions. [2021-08-21 12:00:14,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:00:14,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:00:14,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:14,185 INFO L225 Difference]: With dead ends: 23617 [2021-08-21 12:00:14,186 INFO L226 Difference]: Without dead ends: 23583 [2021-08-21 12:00:14,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 575.5ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:00:14,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23583 states. [2021-08-21 12:00:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23583 to 22217. [2021-08-21 12:00:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 2.3653222902412674) internal successors, (52548), 22216 states have internal predecessors, (52548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 52548 transitions. [2021-08-21 12:00:14,521 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 52548 transitions. Word has length 38 [2021-08-21 12:00:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:14,521 INFO L470 AbstractCegarLoop]: Abstraction has 22217 states and 52548 transitions. [2021-08-21 12:00:14,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 52548 transitions. [2021-08-21 12:00:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:14,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:14,539 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:14,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:14,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:14,739 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:14,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:14,740 INFO L82 PathProgramCache]: Analyzing trace with hash 253122132, now seen corresponding path program 72 times [2021-08-21 12:00:14,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:14,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174573295] [2021-08-21 12:00:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:14,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:14,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:14,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174573295] [2021-08-21 12:00:14,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174573295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:14,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092109415] [2021-08-21 12:00:14,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:14,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:14,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:14,940 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 12:00:14,940 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 12:00:16,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:00:16,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:16,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:16,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:17,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092109415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:17,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:17,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 12:00:17,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540338683] [2021-08-21 12:00:17,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:00:17,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:17,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:00:17,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:00:17,228 INFO L87 Difference]: Start difference. First operand 22217 states and 52548 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:17,885 INFO L93 Difference]: Finished difference Result 22805 states and 53843 transitions. [2021-08-21 12:00:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:00:17,886 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:00:17,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:17,926 INFO L225 Difference]: With dead ends: 22805 [2021-08-21 12:00:17,926 INFO L226 Difference]: Without dead ends: 22788 [2021-08-21 12:00:17,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 483.1ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:00:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22788 states. [2021-08-21 12:00:18,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22788 to 22542. [2021-08-21 12:00:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 2.3664433698593674) internal successors, (53342), 22541 states have internal predecessors, (53342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 53342 transitions. [2021-08-21 12:00:18,284 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 53342 transitions. Word has length 38 [2021-08-21 12:00:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:18,285 INFO L470 AbstractCegarLoop]: Abstraction has 22542 states and 53342 transitions. [2021-08-21 12:00:18,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:18,285 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 53342 transitions. [2021-08-21 12:00:18,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:18,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:18,302 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:18,326 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 12:00:18,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-21 12:00:18,503 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:18,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2010766742, now seen corresponding path program 73 times [2021-08-21 12:00:18,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:18,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223850846] [2021-08-21 12:00:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:18,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:18,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:18,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223850846] [2021-08-21 12:00:18,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223850846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:18,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116882775] [2021-08-21 12:00:18,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:18,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:18,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:18,718 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 12:00:18,719 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 12:00:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:20,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:20,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:21,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116882775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:21,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:21,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 12:00:21,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529729736] [2021-08-21 12:00:21,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:00:21,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:21,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:00:21,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:00:21,168 INFO L87 Difference]: Start difference. First operand 22542 states and 53342 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:21,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:21,764 INFO L93 Difference]: Finished difference Result 23126 states and 54628 transitions. [2021-08-21 12:00:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:00:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:00:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:21,804 INFO L225 Difference]: With dead ends: 23126 [2021-08-21 12:00:21,804 INFO L226 Difference]: Without dead ends: 23109 [2021-08-21 12:00:21,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 494.7ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:00:21,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23109 states. [2021-08-21 12:00:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23109 to 22863. [2021-08-21 12:00:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22863 states, 22862 states have (on average 2.367553144956697) internal successors, (54127), 22862 states have internal predecessors, (54127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22863 states to 22863 states and 54127 transitions. [2021-08-21 12:00:22,134 INFO L78 Accepts]: Start accepts. Automaton has 22863 states and 54127 transitions. Word has length 38 [2021-08-21 12:00:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:22,134 INFO L470 AbstractCegarLoop]: Abstraction has 22863 states and 54127 transitions. [2021-08-21 12:00:22,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 22863 states and 54127 transitions. [2021-08-21 12:00:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:22,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:22,152 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:22,173 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 12:00:22,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:22,353 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:22,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:22,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1725520592, now seen corresponding path program 74 times [2021-08-21 12:00:22,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:22,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744576165] [2021-08-21 12:00:22,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:22,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:22,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:22,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744576165] [2021-08-21 12:00:22,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744576165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:22,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809675516] [2021-08-21 12:00:22,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:22,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:22,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:22,559 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 12:00:22,559 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 12:00:24,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:24,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:24,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:24,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:24,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809675516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:24,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:24,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 12:00:24,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218744173] [2021-08-21 12:00:24,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:00:24,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:24,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:00:24,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:00:24,923 INFO L87 Difference]: Start difference. First operand 22863 states and 54127 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:25,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:25,756 INFO L93 Difference]: Finished difference Result 24322 states and 57349 transitions. [2021-08-21 12:00:25,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:00:25,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:00:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:25,791 INFO L225 Difference]: With dead ends: 24322 [2021-08-21 12:00:25,791 INFO L226 Difference]: Without dead ends: 24288 [2021-08-21 12:00:25,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 553.0ms TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:00:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24288 states. [2021-08-21 12:00:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24288 to 23374. [2021-08-21 12:00:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23374 states, 23373 states have (on average 2.3687588242844306) internal successors, (55365), 23373 states have internal predecessors, (55365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23374 states to 23374 states and 55365 transitions. [2021-08-21 12:00:26,135 INFO L78 Accepts]: Start accepts. Automaton has 23374 states and 55365 transitions. Word has length 38 [2021-08-21 12:00:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:26,135 INFO L470 AbstractCegarLoop]: Abstraction has 23374 states and 55365 transitions. [2021-08-21 12:00:26,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 23374 states and 55365 transitions. [2021-08-21 12:00:26,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:26,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:26,152 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:26,173 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 12:00:26,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:26,353 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:26,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:26,353 INFO L82 PathProgramCache]: Analyzing trace with hash -925910520, now seen corresponding path program 75 times [2021-08-21 12:00:26,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:26,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967399999] [2021-08-21 12:00:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:26,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:26,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:26,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967399999] [2021-08-21 12:00:26,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967399999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:26,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886029128] [2021-08-21 12:00:26,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:26,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:26,571 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 12:00:26,572 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 12:00:28,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:00:28,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:28,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:28,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:28,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886029128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:28,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:28,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 12:00:28,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563027098] [2021-08-21 12:00:28,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:00:28,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:28,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:00:28,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:00:28,932 INFO L87 Difference]: Start difference. First operand 23374 states and 55365 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:29,875 INFO L93 Difference]: Finished difference Result 27871 states and 65364 transitions. [2021-08-21 12:00:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:00:29,876 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:00:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:29,930 INFO L225 Difference]: With dead ends: 27871 [2021-08-21 12:00:29,930 INFO L226 Difference]: Without dead ends: 27837 [2021-08-21 12:00:29,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 631.3ms TimeCoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:00:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27837 states. [2021-08-21 12:00:30,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27837 to 25120. [2021-08-21 12:00:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25120 states, 25119 states have (on average 2.3722281937975236) internal successors, (59588), 25119 states have internal predecessors, (59588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25120 states to 25120 states and 59588 transitions. [2021-08-21 12:00:30,334 INFO L78 Accepts]: Start accepts. Automaton has 25120 states and 59588 transitions. Word has length 38 [2021-08-21 12:00:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:30,334 INFO L470 AbstractCegarLoop]: Abstraction has 25120 states and 59588 transitions. [2021-08-21 12:00:30,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 25120 states and 59588 transitions. [2021-08-21 12:00:30,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:30,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:30,353 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:30,384 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 12:00:30,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-21 12:00:30,553 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:30,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1925825072, now seen corresponding path program 76 times [2021-08-21 12:00:30,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:30,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067187837] [2021-08-21 12:00:30,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:30,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:30,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:30,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067187837] [2021-08-21 12:00:30,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067187837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:30,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287132857] [2021-08-21 12:00:30,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:30,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:30,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:30,754 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 12:00:30,754 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 12:00:32,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:32,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:32,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:32,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:33,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287132857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:33,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:33,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 12:00:33,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663208851] [2021-08-21 12:00:33,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:00:33,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:33,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:00:33,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:00:33,253 INFO L87 Difference]: Start difference. First operand 25120 states and 59588 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 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 12:00:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:34,131 INFO L93 Difference]: Finished difference Result 28307 states and 66840 transitions. [2021-08-21 12:00:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:00:34,132 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 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 38 [2021-08-21 12:00:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:34,179 INFO L225 Difference]: With dead ends: 28307 [2021-08-21 12:00:34,180 INFO L226 Difference]: Without dead ends: 28255 [2021-08-21 12:00:34,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 655.4ms TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:00:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28255 states. [2021-08-21 12:00:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28255 to 26230. [2021-08-21 12:00:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26230 states, 26229 states have (on average 2.3725265927027337) internal successors, (62229), 26229 states have internal predecessors, (62229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:34,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26230 states to 26230 states and 62229 transitions. [2021-08-21 12:00:34,608 INFO L78 Accepts]: Start accepts. Automaton has 26230 states and 62229 transitions. Word has length 38 [2021-08-21 12:00:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:34,608 INFO L470 AbstractCegarLoop]: Abstraction has 26230 states and 62229 transitions. [2021-08-21 12:00:34,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 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 12:00:34,608 INFO L276 IsEmpty]: Start isEmpty. Operand 26230 states and 62229 transitions. [2021-08-21 12:00:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:34,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:34,629 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:34,653 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 12:00:34,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:34,842 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:34,842 INFO L82 PathProgramCache]: Analyzing trace with hash -198181364, now seen corresponding path program 77 times [2021-08-21 12:00:34,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:34,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222126880] [2021-08-21 12:00:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:34,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:35,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:35,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222126880] [2021-08-21 12:00:35,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222126880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:35,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027199252] [2021-08-21 12:00:35,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:35,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:35,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:35,054 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 12:00:35,055 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 12:00:37,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:00:37,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:37,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:37,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027199252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:37,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:37,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 12:00:37,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407687248] [2021-08-21 12:00:37,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:00:37,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:37,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:00:37,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:00:37,455 INFO L87 Difference]: Start difference. First operand 26230 states and 62229 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:38,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:38,100 INFO L93 Difference]: Finished difference Result 27788 states and 65761 transitions. [2021-08-21 12:00:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:00:38,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:00:38,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:38,148 INFO L225 Difference]: With dead ends: 27788 [2021-08-21 12:00:38,148 INFO L226 Difference]: Without dead ends: 27745 [2021-08-21 12:00:38,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:00:38,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27745 states. [2021-08-21 12:00:38,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27745 to 27377. [2021-08-21 12:00:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27377 states, 27376 states have (on average 2.3733927527761542) internal successors, (64974), 27376 states have internal predecessors, (64974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27377 states to 27377 states and 64974 transitions. [2021-08-21 12:00:38,615 INFO L78 Accepts]: Start accepts. Automaton has 27377 states and 64974 transitions. Word has length 38 [2021-08-21 12:00:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:38,615 INFO L470 AbstractCegarLoop]: Abstraction has 27377 states and 64974 transitions. [2021-08-21 12:00:38,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 27377 states and 64974 transitions. [2021-08-21 12:00:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:38,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:38,634 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:38,655 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 12:00:38,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:38,834 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:38,834 INFO L82 PathProgramCache]: Analyzing trace with hash -165993464, now seen corresponding path program 78 times [2021-08-21 12:00:38,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:38,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574333797] [2021-08-21 12:00:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:38,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:39,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:39,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574333797] [2021-08-21 12:00:39,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574333797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:39,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134086366] [2021-08-21 12:00:39,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:39,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:39,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:39,038 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 12:00:39,039 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 12:00:41,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:00:41,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:41,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:41,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:41,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134086366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:41,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:41,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 12:00:41,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315333805] [2021-08-21 12:00:41,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:00:41,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:41,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:00:41,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:00:41,599 INFO L87 Difference]: Start difference. First operand 27377 states and 64974 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:42,753 INFO L93 Difference]: Finished difference Result 36328 states and 85544 transitions. [2021-08-21 12:00:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:00:42,753 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:00:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:42,813 INFO L225 Difference]: With dead ends: 36328 [2021-08-21 12:00:42,813 INFO L226 Difference]: Without dead ends: 36251 [2021-08-21 12:00:42,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 825.1ms TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:00:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36251 states. [2021-08-21 12:00:43,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36251 to 31462. [2021-08-21 12:00:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31462 states, 31461 states have (on average 2.380757127872604) internal successors, (74901), 31461 states have internal predecessors, (74901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31462 states to 31462 states and 74901 transitions. [2021-08-21 12:00:43,371 INFO L78 Accepts]: Start accepts. Automaton has 31462 states and 74901 transitions. Word has length 38 [2021-08-21 12:00:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:43,371 INFO L470 AbstractCegarLoop]: Abstraction has 31462 states and 74901 transitions. [2021-08-21 12:00:43,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 31462 states and 74901 transitions. [2021-08-21 12:00:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:43,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:43,390 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:43,412 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 12:00:43,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 12:00:43,591 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:43,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:43,591 INFO L82 PathProgramCache]: Analyzing trace with hash 679972510, now seen corresponding path program 79 times [2021-08-21 12:00:43,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:43,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831096153] [2021-08-21 12:00:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:43,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:43,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:43,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831096153] [2021-08-21 12:00:43,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831096153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:43,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166845934] [2021-08-21 12:00:43,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:43,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:43,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:43,801 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 12:00:43,802 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 12:00:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:45,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:45,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:46,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166845934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:46,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:46,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 12:00:46,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571227066] [2021-08-21 12:00:46,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:00:46,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:46,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:00:46,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:00:46,438 INFO L87 Difference]: Start difference. First operand 31462 states and 74901 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:47,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:47,144 INFO L93 Difference]: Finished difference Result 33748 states and 79992 transitions. [2021-08-21 12:00:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:00:47,144 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:00:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:47,205 INFO L225 Difference]: With dead ends: 33748 [2021-08-21 12:00:47,205 INFO L226 Difference]: Without dead ends: 33715 [2021-08-21 12:00:47,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:00:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33715 states. [2021-08-21 12:00:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33715 to 32708. [2021-08-21 12:00:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32708 states, 32707 states have (on average 2.38224233344544) internal successors, (77916), 32707 states have internal predecessors, (77916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32708 states to 32708 states and 77916 transitions. [2021-08-21 12:00:47,736 INFO L78 Accepts]: Start accepts. Automaton has 32708 states and 77916 transitions. Word has length 38 [2021-08-21 12:00:47,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:47,736 INFO L470 AbstractCegarLoop]: Abstraction has 32708 states and 77916 transitions. [2021-08-21 12:00:47,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand 32708 states and 77916 transitions. [2021-08-21 12:00:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:47,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:47,843 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:47,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:48,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:48,043 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:48,043 INFO L82 PathProgramCache]: Analyzing trace with hash 442535240, now seen corresponding path program 80 times [2021-08-21 12:00:48,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:48,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506911853] [2021-08-21 12:00:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:48,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:48,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:48,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506911853] [2021-08-21 12:00:48,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506911853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:48,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798456255] [2021-08-21 12:00:48,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:48,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:48,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:48,271 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 12:00:48,271 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 12:00:50,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:50,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:50,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:50,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:50,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798456255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:50,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:50,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-08-21 12:00:50,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987868635] [2021-08-21 12:00:50,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:00:50,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:50,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:00:50,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:00:50,759 INFO L87 Difference]: Start difference. First operand 32708 states and 77916 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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 12:00:51,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:51,423 INFO L93 Difference]: Finished difference Result 35110 states and 83307 transitions. [2021-08-21 12:00:51,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:00:51,423 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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) Word has length 38 [2021-08-21 12:00:51,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:51,485 INFO L225 Difference]: With dead ends: 35110 [2021-08-21 12:00:51,485 INFO L226 Difference]: Without dead ends: 35069 [2021-08-21 12:00:51,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:00:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35069 states. [2021-08-21 12:00:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35069 to 34187. [2021-08-21 12:00:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34187 states, 34186 states have (on average 2.3835780728953373) internal successors, (81485), 34186 states have internal predecessors, (81485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34187 states to 34187 states and 81485 transitions. [2021-08-21 12:00:52,037 INFO L78 Accepts]: Start accepts. Automaton has 34187 states and 81485 transitions. Word has length 38 [2021-08-21 12:00:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:52,037 INFO L470 AbstractCegarLoop]: Abstraction has 34187 states and 81485 transitions. [2021-08-21 12:00:52,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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 12:00:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 34187 states and 81485 transitions. [2021-08-21 12:00:52,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:52,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:52,057 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:52,080 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 12:00:52,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:52,257 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:52,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:52,258 INFO L82 PathProgramCache]: Analyzing trace with hash -539726550, now seen corresponding path program 81 times [2021-08-21 12:00:52,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:52,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096432001] [2021-08-21 12:00:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:52,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:52,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:52,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096432001] [2021-08-21 12:00:52,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096432001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:52,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478558437] [2021-08-21 12:00:52,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:52,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:52,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:52,471 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 12:00:52,472 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 12:00:54,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:00:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:00:54,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:55,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478558437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:55,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:55,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 12:00:55,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272408428] [2021-08-21 12:00:55,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:00:55,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:00:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:00:55,182 INFO L87 Difference]: Start difference. First operand 34187 states and 81485 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:56,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:56,665 INFO L93 Difference]: Finished difference Result 40688 states and 96358 transitions. [2021-08-21 12:00:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:00:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:00:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:56,747 INFO L225 Difference]: With dead ends: 40688 [2021-08-21 12:00:56,747 INFO L226 Difference]: Without dead ends: 40654 [2021-08-21 12:00:56,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 807.4ms TimeCoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 12:00:56,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40654 states. [2021-08-21 12:00:57,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40654 to 37776. [2021-08-21 12:00:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37776 states, 37775 states have (on average 2.3929053606882857) internal successors, (90392), 37775 states have internal predecessors, (90392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37776 states to 37776 states and 90392 transitions. [2021-08-21 12:00:57,365 INFO L78 Accepts]: Start accepts. Automaton has 37776 states and 90392 transitions. Word has length 38 [2021-08-21 12:00:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:57,365 INFO L470 AbstractCegarLoop]: Abstraction has 37776 states and 90392 transitions. [2021-08-21 12:00:57,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 37776 states and 90392 transitions. [2021-08-21 12:00:57,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:57,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:57,388 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:57,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:57,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:57,588 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:57,588 INFO L82 PathProgramCache]: Analyzing trace with hash 423917610, now seen corresponding path program 82 times [2021-08-21 12:00:57,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:57,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245436079] [2021-08-21 12:00:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:57,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:57,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:57,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245436079] [2021-08-21 12:00:57,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245436079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:57,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215023956] [2021-08-21 12:00:57,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:57,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:57,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:57,784 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 12:00:57,785 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 12:01:00,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:00,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:00,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:01:00,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:01:00,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215023956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:00,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:00,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 12:01:00,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908081246] [2021-08-21 12:01:00,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:01:00,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:00,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:01:00,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:01:00,533 INFO L87 Difference]: Start difference. First operand 37776 states and 90392 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 12:01:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:01,536 INFO L93 Difference]: Finished difference Result 40320 states and 96087 transitions. [2021-08-21 12:01:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:01:01,536 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) Word has length 38 [2021-08-21 12:01:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:01,608 INFO L225 Difference]: With dead ends: 40320 [2021-08-21 12:01:01,609 INFO L226 Difference]: Without dead ends: 40277 [2021-08-21 12:01:01,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 604.5ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:01:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40277 states. [2021-08-21 12:01:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40277 to 37806. [2021-08-21 12:01:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37806 states, 37805 states have (on average 2.3926464753339505) internal successors, (90454), 37805 states have internal predecessors, (90454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37806 states to 37806 states and 90454 transitions. [2021-08-21 12:01:02,220 INFO L78 Accepts]: Start accepts. Automaton has 37806 states and 90454 transitions. Word has length 38 [2021-08-21 12:01:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:02,221 INFO L470 AbstractCegarLoop]: Abstraction has 37806 states and 90454 transitions. [2021-08-21 12:01:02,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 12:01:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 37806 states and 90454 transitions. [2021-08-21 12:01:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:01:02,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:02,247 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:02,269 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 12:01:02,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-21 12:01:02,447 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:02,448 INFO L82 PathProgramCache]: Analyzing trace with hash -655481028, now seen corresponding path program 83 times [2021-08-21 12:01:02,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:02,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470477400] [2021-08-21 12:01:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:02,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:02,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:02,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470477400] [2021-08-21 12:01:02,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470477400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:02,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24321336] [2021-08-21 12:01:02,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:02,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:02,643 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 12:01:02,644 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 12:01:04,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:01:04,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:04,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:01:04,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:05,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24321336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:05,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:05,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 12:01:05,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082894827] [2021-08-21 12:01:05,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:01:05,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:05,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:01:05,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:01:05,420 INFO L87 Difference]: Start difference. First operand 37806 states and 90454 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:06,115 INFO L93 Difference]: Finished difference Result 39152 states and 93430 transitions. [2021-08-21 12:01:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:01:06,116 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:01:06,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:06,192 INFO L225 Difference]: With dead ends: 39152 [2021-08-21 12:01:06,193 INFO L226 Difference]: Without dead ends: 39118 [2021-08-21 12:01:06,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:01:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39118 states. [2021-08-21 12:01:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39118 to 38927. [2021-08-21 12:01:06,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38927 states, 38926 states have (on average 2.3894055387144837) internal successors, (93010), 38926 states have internal predecessors, (93010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38927 states to 38927 states and 93010 transitions. [2021-08-21 12:01:07,045 INFO L78 Accepts]: Start accepts. Automaton has 38927 states and 93010 transitions. Word has length 38 [2021-08-21 12:01:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:07,045 INFO L470 AbstractCegarLoop]: Abstraction has 38927 states and 93010 transitions. [2021-08-21 12:01:07,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 38927 states and 93010 transitions. [2021-08-21 12:01:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:01:07,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:07,065 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:07,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 12:01:07,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:07,266 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:07,266 INFO L82 PathProgramCache]: Analyzing trace with hash -181722796, now seen corresponding path program 84 times [2021-08-21 12:01:07,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:07,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926410119] [2021-08-21 12:01:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:07,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:07,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:07,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926410119] [2021-08-21 12:01:07,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926410119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:07,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878781534] [2021-08-21 12:01:07,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:07,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:07,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:07,512 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 12:01:07,512 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 12:01:09,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:01:09,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:09,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:01:09,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:10,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878781534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:10,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:10,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 12:01:10,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433897238] [2021-08-21 12:01:10,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:01:10,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:10,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:01:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:01:10,148 INFO L87 Difference]: Start difference. First operand 38927 states and 93010 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:10,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:10,906 INFO L93 Difference]: Finished difference Result 39710 states and 94740 transitions. [2021-08-21 12:01:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:01:10,906 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:01:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:10,973 INFO L225 Difference]: With dead ends: 39710 [2021-08-21 12:01:10,973 INFO L226 Difference]: Without dead ends: 39676 [2021-08-21 12:01:10,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 575.3ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:01:11,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39676 states. [2021-08-21 12:01:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39676 to 39279. [2021-08-21 12:01:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39279 states, 39278 states have (on average 2.390091145170324) internal successors, (93878), 39278 states have internal predecessors, (93878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39279 states to 39279 states and 93878 transitions. [2021-08-21 12:01:11,708 INFO L78 Accepts]: Start accepts. Automaton has 39279 states and 93878 transitions. Word has length 38 [2021-08-21 12:01:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:11,708 INFO L470 AbstractCegarLoop]: Abstraction has 39279 states and 93878 transitions. [2021-08-21 12:01:11,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 39279 states and 93878 transitions. [2021-08-21 12:01:11,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:01:11,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:11,729 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:11,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 12:01:11,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:11,937 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:11,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1461813388, now seen corresponding path program 85 times [2021-08-21 12:01:11,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:11,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093230872] [2021-08-21 12:01:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:11,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:12,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:12,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093230872] [2021-08-21 12:01:12,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093230872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:12,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700718756] [2021-08-21 12:01:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:12,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:12,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:12,276 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 12:01:12,277 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 12:01:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:14,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:01:14,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:15,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700718756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:15,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:15,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 12:01:15,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905720749] [2021-08-21 12:01:15,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:01:15,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:15,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:01:15,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:01:15,075 INFO L87 Difference]: Start difference. First operand 39279 states and 93878 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:15,846 INFO L93 Difference]: Finished difference Result 41067 states and 97771 transitions. [2021-08-21 12:01:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:01:15,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:01:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:15,917 INFO L225 Difference]: With dead ends: 41067 [2021-08-21 12:01:15,917 INFO L226 Difference]: Without dead ends: 41033 [2021-08-21 12:01:15,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 632.5ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:01:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41033 states. [2021-08-21 12:01:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41033 to 39745. [2021-08-21 12:01:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39745 states, 39744 states have (on average 2.3893669484702094) internal successors, (94963), 39744 states have internal predecessors, (94963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39745 states to 39745 states and 94963 transitions. [2021-08-21 12:01:16,662 INFO L78 Accepts]: Start accepts. Automaton has 39745 states and 94963 transitions. Word has length 38 [2021-08-21 12:01:16,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:16,662 INFO L470 AbstractCegarLoop]: Abstraction has 39745 states and 94963 transitions. [2021-08-21 12:01:16,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 39745 states and 94963 transitions. [2021-08-21 12:01:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:01:16,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:16,797 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:16,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:17,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:17,013 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash 781921364, now seen corresponding path program 86 times [2021-08-21 12:01:17,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:17,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504661316] [2021-08-21 12:01:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:17,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:17,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:17,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504661316] [2021-08-21 12:01:17,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504661316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:17,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680829796] [2021-08-21 12:01:17,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:17,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:17,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:17,222 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 12:01:17,223 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 12:01:19,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:19,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:19,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:01:19,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:01:20,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680829796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:20,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:20,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 12:01:20,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922577865] [2021-08-21 12:01:20,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:01:20,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:20,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:01:20,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:01:20,107 INFO L87 Difference]: Start difference. First operand 39745 states and 94963 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 12:01:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:20,863 INFO L93 Difference]: Finished difference Result 42419 states and 100916 transitions. [2021-08-21 12:01:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:01:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) Word has length 38 [2021-08-21 12:01:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:20,942 INFO L225 Difference]: With dead ends: 42419 [2021-08-21 12:01:20,943 INFO L226 Difference]: Without dead ends: 42376 [2021-08-21 12:01:20,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 555.3ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:01:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2021-08-21 12:01:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 39971. [2021-08-21 12:01:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39971 states, 39970 states have (on average 2.3887415561671252) internal successors, (95478), 39970 states have internal predecessors, (95478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39971 states to 39971 states and 95478 transitions. [2021-08-21 12:01:21,600 INFO L78 Accepts]: Start accepts. Automaton has 39971 states and 95478 transitions. Word has length 38 [2021-08-21 12:01:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:21,600 INFO L470 AbstractCegarLoop]: Abstraction has 39971 states and 95478 transitions. [2021-08-21 12:01:21,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 12:01:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 39971 states and 95478 transitions. [2021-08-21 12:01:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:01:21,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:21,626 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:21,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 12:01:21,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:21,827 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:21,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:21,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1696044670, now seen corresponding path program 87 times [2021-08-21 12:01:21,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:21,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262196745] [2021-08-21 12:01:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:21,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:22,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:22,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262196745] [2021-08-21 12:01:22,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262196745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:22,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080490998] [2021-08-21 12:01:22,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:22,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:22,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:22,045 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 12:01:22,046 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 12:01:24,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:24,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:24,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:01:24,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:25,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080490998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:25,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:25,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 12:01:25,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044817994] [2021-08-21 12:01:25,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:01:25,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:25,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:01:25,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:01:25,074 INFO L87 Difference]: Start difference. First operand 39971 states and 95478 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:25,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:25,723 INFO L93 Difference]: Finished difference Result 40507 states and 96663 transitions. [2021-08-21 12:01:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:01:25,723 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:01:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:25,806 INFO L225 Difference]: With dead ends: 40507 [2021-08-21 12:01:25,806 INFO L226 Difference]: Without dead ends: 40490 [2021-08-21 12:01:25,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 484.2ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:01:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40490 states. [2021-08-21 12:01:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40490 to 40295. [2021-08-21 12:01:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40295 states, 40294 states have (on average 2.389189457487467) internal successors, (96270), 40294 states have internal predecessors, (96270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40295 states to 40295 states and 96270 transitions. [2021-08-21 12:01:26,489 INFO L78 Accepts]: Start accepts. Automaton has 40295 states and 96270 transitions. Word has length 38 [2021-08-21 12:01:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:26,489 INFO L470 AbstractCegarLoop]: Abstraction has 40295 states and 96270 transitions. [2021-08-21 12:01:26,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 40295 states and 96270 transitions. [2021-08-21 12:01:26,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:01:26,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:26,513 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:26,539 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 12:01:26,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-21 12:01:26,729 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash 472095440, now seen corresponding path program 88 times [2021-08-21 12:01:26,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:26,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849467085] [2021-08-21 12:01:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:26,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:26,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:26,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849467085] [2021-08-21 12:01:26,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849467085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:26,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644398334] [2021-08-21 12:01:26,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:26,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:26,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:26,931 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 12:01:26,931 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 12:01:29,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:29,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:29,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:01:29,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:30,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644398334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:30,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:30,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 12:01:30,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382900461] [2021-08-21 12:01:30,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:01:30,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:30,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:01:30,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:01:30,001 INFO L87 Difference]: Start difference. First operand 40295 states and 96270 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:30,692 INFO L93 Difference]: Finished difference Result 40827 states and 97446 transitions. [2021-08-21 12:01:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:01:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:01:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:30,762 INFO L225 Difference]: With dead ends: 40827 [2021-08-21 12:01:30,762 INFO L226 Difference]: Without dead ends: 40810 [2021-08-21 12:01:30,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 484.9ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:01:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40810 states. [2021-08-21 12:01:31,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40810 to 40615. [2021-08-21 12:01:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40615 states, 40614 states have (on average 2.389643965135175) internal successors, (97053), 40614 states have internal predecessors, (97053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40615 states to 40615 states and 97053 transitions. [2021-08-21 12:01:31,448 INFO L78 Accepts]: Start accepts. Automaton has 40615 states and 97053 transitions. Word has length 38 [2021-08-21 12:01:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:31,449 INFO L470 AbstractCegarLoop]: Abstraction has 40615 states and 97053 transitions. [2021-08-21 12:01:31,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 40615 states and 97053 transitions. [2021-08-21 12:01:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:01:31,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:31,471 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:31,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:31,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-21 12:01:31,673 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:31,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1018970100, now seen corresponding path program 89 times [2021-08-21 12:01:31,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:31,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823367443] [2021-08-21 12:01:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:31,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:32,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:32,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823367443] [2021-08-21 12:01:32,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823367443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:32,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910746782] [2021-08-21 12:01:32,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:32,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:32,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:32,045 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 12:01:32,045 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 12:01:34,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:01:34,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:34,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:01:34,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:35,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910746782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:35,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:35,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 12:01:35,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858743868] [2021-08-21 12:01:35,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 12:01:35,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 12:01:35,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:01:35,015 INFO L87 Difference]: Start difference. First operand 40615 states and 97053 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 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 12:01:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:35,911 INFO L93 Difference]: Finished difference Result 41685 states and 99369 transitions. [2021-08-21 12:01:35,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:01:35,912 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:01:35,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:35,981 INFO L225 Difference]: With dead ends: 41685 [2021-08-21 12:01:35,981 INFO L226 Difference]: Without dead ends: 41668 [2021-08-21 12:01:35,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 652.8ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:01:36,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41668 states. [2021-08-21 12:01:36,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41668 to 40952. [2021-08-21 12:01:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40952 states, 40951 states have (on average 2.390124783277576) internal successors, (97878), 40951 states have internal predecessors, (97878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40952 states to 40952 states and 97878 transitions. [2021-08-21 12:01:36,749 INFO L78 Accepts]: Start accepts. Automaton has 40952 states and 97878 transitions. Word has length 38 [2021-08-21 12:01:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:36,749 INFO L470 AbstractCegarLoop]: Abstraction has 40952 states and 97878 transitions. [2021-08-21 12:01:36,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 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 12:01:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 40952 states and 97878 transitions. [2021-08-21 12:01:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:01:36,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:36,773 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:36,802 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 12:01:36,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:36,974 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:36,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:36,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1838109140, now seen corresponding path program 90 times [2021-08-21 12:01:36,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:36,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900015908] [2021-08-21 12:01:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:36,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:37,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:37,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900015908] [2021-08-21 12:01:37,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900015908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:37,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901906311] [2021-08-21 12:01:37,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:37,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:37,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:37,303 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 12:01:37,304 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 12:01:39,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:01:39,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:01:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:40,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901906311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:40,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:40,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 12:01:40,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648881466] [2021-08-21 12:01:40,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:01:40,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:40,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:01:40,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:01:40,273 INFO L87 Difference]: Start difference. First operand 40952 states and 97878 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:41,005 INFO L93 Difference]: Finished difference Result 41871 states and 99905 transitions. [2021-08-21 12:01:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:01:41,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:01:41,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:41,075 INFO L225 Difference]: With dead ends: 41871 [2021-08-21 12:01:41,075 INFO L226 Difference]: Without dead ends: 41837 [2021-08-21 12:01:41,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:01:41,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41837 states. [2021-08-21 12:01:41,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41837 to 41439. [2021-08-21 12:01:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41439 states, 41438 states have (on average 2.3901974033495823) internal successors, (99045), 41438 states have internal predecessors, (99045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41439 states to 41439 states and 99045 transitions. [2021-08-21 12:01:41,911 INFO L78 Accepts]: Start accepts. Automaton has 41439 states and 99045 transitions. Word has length 38 [2021-08-21 12:01:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:41,911 INFO L470 AbstractCegarLoop]: Abstraction has 41439 states and 99045 transitions. [2021-08-21 12:01:41,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand 41439 states and 99045 transitions. [2021-08-21 12:01:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:01:41,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:41,943 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:41,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:42,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:42,144 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:42,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:42,144 INFO L82 PathProgramCache]: Analyzing trace with hash -813321972, now seen corresponding path program 91 times [2021-08-21 12:01:42,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:42,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438575538] [2021-08-21 12:01:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:42,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:42,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:42,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438575538] [2021-08-21 12:01:42,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438575538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:42,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045114281] [2021-08-21 12:01:42,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:42,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:42,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:42,334 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 12:01:42,334 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 12:01:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:44,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:01:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:45,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045114281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:45,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:45,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 12:01:45,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209683007] [2021-08-21 12:01:45,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:01:45,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:45,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:01:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:01:45,330 INFO L87 Difference]: Start difference. First operand 41439 states and 99045 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:46,146 INFO L93 Difference]: Finished difference Result 43352 states and 103181 transitions. [2021-08-21 12:01:46,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:01:46,146 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:01:46,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:46,220 INFO L225 Difference]: With dead ends: 43352 [2021-08-21 12:01:46,220 INFO L226 Difference]: Without dead ends: 43318 [2021-08-21 12:01:46,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 540.3ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:01:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43318 states. [2021-08-21 12:01:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43318 to 42025. [2021-08-21 12:01:46,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42025 states, 42024 states have (on average 2.389539310869979) internal successors, (100418), 42024 states have internal predecessors, (100418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:47,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42025 states to 42025 states and 100418 transitions. [2021-08-21 12:01:47,022 INFO L78 Accepts]: Start accepts. Automaton has 42025 states and 100418 transitions. Word has length 38 [2021-08-21 12:01:47,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:47,022 INFO L470 AbstractCegarLoop]: Abstraction has 42025 states and 100418 transitions. [2021-08-21 12:01:47,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:47,022 INFO L276 IsEmpty]: Start isEmpty. Operand 42025 states and 100418 transitions. [2021-08-21 12:01:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:01:47,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:47,046 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:47,069 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 12:01:47,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 12:01:47,247 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:47,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:47,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1493213996, now seen corresponding path program 92 times [2021-08-21 12:01:47,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:47,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219931872] [2021-08-21 12:01:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:47,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:47,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:47,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219931872] [2021-08-21 12:01:47,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219931872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:47,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895079545] [2021-08-21 12:01:47,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:47,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:47,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:47,606 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 12:01:47,607 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 12:01:50,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:50,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:01:50,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:01:50,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895079545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:50,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:50,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 12:01:50,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618050904] [2021-08-21 12:01:50,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:01:50,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:01:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:01:50,740 INFO L87 Difference]: Start difference. First operand 42025 states and 100418 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 12:01:51,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:51,488 INFO L93 Difference]: Finished difference Result 44617 states and 106177 transitions. [2021-08-21 12:01:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:01:51,488 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) Word has length 38 [2021-08-21 12:01:51,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:51,576 INFO L225 Difference]: With dead ends: 44617 [2021-08-21 12:01:51,576 INFO L226 Difference]: Without dead ends: 44574 [2021-08-21 12:01:51,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 668.7ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:01:51,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44574 states. [2021-08-21 12:01:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44574 to 43210. [2021-08-21 12:01:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43210 states, 43209 states have (on average 2.3895021870443656) internal successors, (103248), 43209 states have internal predecessors, (103248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43210 states to 43210 states and 103248 transitions. [2021-08-21 12:01:52,267 INFO L78 Accepts]: Start accepts. Automaton has 43210 states and 103248 transitions. Word has length 38 [2021-08-21 12:01:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:52,267 INFO L470 AbstractCegarLoop]: Abstraction has 43210 states and 103248 transitions. [2021-08-21 12:01:52,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 12:01:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 43210 states and 103248 transitions. [2021-08-21 12:01:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:01:52,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:52,292 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:52,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:52,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:52,493 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:52,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:52,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1198330438, now seen corresponding path program 93 times [2021-08-21 12:01:52,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:52,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890406954] [2021-08-21 12:01:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:52,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:52,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:52,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890406954] [2021-08-21 12:01:52,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890406954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:52,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175031188] [2021-08-21 12:01:52,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:52,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:52,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:52,688 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 12:01:52,689 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 12:01:55,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:55,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:55,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:01:55,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:55,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175031188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:55,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:55,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 12:01:55,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922144547] [2021-08-21 12:01:55,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:01:55,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:55,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:01:55,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:01:55,801 INFO L87 Difference]: Start difference. First operand 43210 states and 103248 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:56,428 INFO L93 Difference]: Finished difference Result 43750 states and 104441 transitions. [2021-08-21 12:01:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:01:56,429 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:01:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:56,508 INFO L225 Difference]: With dead ends: 43750 [2021-08-21 12:01:56,508 INFO L226 Difference]: Without dead ends: 43733 [2021-08-21 12:01:56,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 446.0ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:01:56,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43733 states. [2021-08-21 12:01:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43733 to 43536. [2021-08-21 12:01:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43536 states, 43535 states have (on average 2.389893189387849) internal successors, (104044), 43535 states have internal predecessors, (104044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43536 states to 43536 states and 104044 transitions. [2021-08-21 12:01:57,241 INFO L78 Accepts]: Start accepts. Automaton has 43536 states and 104044 transitions. Word has length 38 [2021-08-21 12:01:57,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:57,241 INFO L470 AbstractCegarLoop]: Abstraction has 43536 states and 104044 transitions. [2021-08-21 12:01:57,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 43536 states and 104044 transitions. [2021-08-21 12:01:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:01:57,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:57,265 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:57,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 12:01:57,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 12:01:57,466 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:57,466 INFO L82 PathProgramCache]: Analyzing trace with hash 154558750, now seen corresponding path program 94 times [2021-08-21 12:01:57,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:57,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119647724] [2021-08-21 12:01:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:57,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:57,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:57,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119647724] [2021-08-21 12:01:57,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119647724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:57,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613949138] [2021-08-21 12:01:57,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:57,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:57,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:57,673 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 12:01:57,674 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 12:02:00,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:00,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:00,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:02:00,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:00,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613949138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:00,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:00,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-21 12:02:00,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310106179] [2021-08-21 12:02:00,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:02:00,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:00,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:02:00,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:00,817 INFO L87 Difference]: Start difference. First operand 43536 states and 104044 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:01,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:01,359 INFO L93 Difference]: Finished difference Result 44087 states and 105256 transitions. [2021-08-21 12:02:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:02:01,359 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 12:02:01,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:01,439 INFO L225 Difference]: With dead ends: 44087 [2021-08-21 12:02:01,439 INFO L226 Difference]: Without dead ends: 44070 [2021-08-21 12:02:01,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:02:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44070 states. [2021-08-21 12:02:01,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44070 to 43846. [2021-08-21 12:02:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43846 states, 43845 states have (on average 2.3903523776941498) internal successors, (104805), 43845 states have internal predecessors, (104805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43846 states to 43846 states and 104805 transitions. [2021-08-21 12:02:02,126 INFO L78 Accepts]: Start accepts. Automaton has 43846 states and 104805 transitions. Word has length 38 [2021-08-21 12:02:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:02,126 INFO L470 AbstractCegarLoop]: Abstraction has 43846 states and 104805 transitions. [2021-08-21 12:02:02,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 43846 states and 104805 transitions. [2021-08-21 12:02:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:02:02,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:02,152 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:02,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 12:02:02,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 12:02:02,353 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1946601264, now seen corresponding path program 95 times [2021-08-21 12:02:02,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:02,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632318192] [2021-08-21 12:02:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:02,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:02,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:02,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632318192] [2021-08-21 12:02:02,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632318192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:02,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387414035] [2021-08-21 12:02:02,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:02,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:02,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:02,395 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 12:02:02,396 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 12:02:05,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:02:05,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:05,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:02:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:05,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387414035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:05,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:05,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:02:05,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404235700] [2021-08-21 12:02:05,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:02:05,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:05,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:02:05,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:02:05,296 INFO L87 Difference]: Start difference. First operand 43846 states and 104805 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:05,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:05,543 INFO L93 Difference]: Finished difference Result 54955 states and 131607 transitions. [2021-08-21 12:02:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:02:05,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:02:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:05,655 INFO L225 Difference]: With dead ends: 54955 [2021-08-21 12:02:05,655 INFO L226 Difference]: Without dead ends: 54921 [2021-08-21 12:02:05,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:05,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54921 states. [2021-08-21 12:02:06,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54921 to 54598. [2021-08-21 12:02:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54598 states, 54597 states have (on average 2.3952781288349176) internal successors, (130775), 54597 states have internal predecessors, (130775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54598 states to 54598 states and 130775 transitions. [2021-08-21 12:02:06,741 INFO L78 Accepts]: Start accepts. Automaton has 54598 states and 130775 transitions. Word has length 39 [2021-08-21 12:02:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:06,741 INFO L470 AbstractCegarLoop]: Abstraction has 54598 states and 130775 transitions. [2021-08-21 12:02:06,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 54598 states and 130775 transitions. [2021-08-21 12:02:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:02:06,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:06,766 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:06,790 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 12:02:06,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-21 12:02:06,967 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:06,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:06,967 INFO L82 PathProgramCache]: Analyzing trace with hash -185359280, now seen corresponding path program 96 times [2021-08-21 12:02:06,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:06,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764622608] [2021-08-21 12:02:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:06,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:07,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:07,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764622608] [2021-08-21 12:02:07,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764622608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:07,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763071318] [2021-08-21 12:02:07,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:07,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:07,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:07,004 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 12:02:07,004 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 12:02:09,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:02:09,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:09,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:02:09,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:02:10,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763071318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:10,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:10,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:02:10,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577474076] [2021-08-21 12:02:10,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:02:10,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:10,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:02:10,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:02:10,042 INFO L87 Difference]: Start difference. First operand 54598 states and 130775 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:10,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:10,326 INFO L93 Difference]: Finished difference Result 54798 states and 130742 transitions. [2021-08-21 12:02:10,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:10,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:02:10,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:10,426 INFO L225 Difference]: With dead ends: 54798 [2021-08-21 12:02:10,426 INFO L226 Difference]: Without dead ends: 54798 [2021-08-21 12:02:10,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:02:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54798 states. [2021-08-21 12:02:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54798 to 49862. [2021-08-21 12:02:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49862 states, 49861 states have (on average 2.3922705120234253) internal successors, (119281), 49861 states have internal predecessors, (119281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49862 states to 49862 states and 119281 transitions. [2021-08-21 12:02:11,253 INFO L78 Accepts]: Start accepts. Automaton has 49862 states and 119281 transitions. Word has length 39 [2021-08-21 12:02:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:11,253 INFO L470 AbstractCegarLoop]: Abstraction has 49862 states and 119281 transitions. [2021-08-21 12:02:11,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 49862 states and 119281 transitions. [2021-08-21 12:02:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:02:11,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:11,277 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:11,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:11,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:11,493 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:11,493 INFO L82 PathProgramCache]: Analyzing trace with hash 815477842, now seen corresponding path program 97 times [2021-08-21 12:02:11,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:11,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560889606] [2021-08-21 12:02:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:11,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:11,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:11,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560889606] [2021-08-21 12:02:11,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560889606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:11,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162836936] [2021-08-21 12:02:11,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:11,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:11,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:11,711 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 12:02:11,711 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 12:02:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:14,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:02:14,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:02:14,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162836936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:14,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:14,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:02:14,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994036484] [2021-08-21 12:02:14,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:02:14,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:02:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:02:14,597 INFO L87 Difference]: Start difference. First operand 49862 states and 119281 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:14,816 INFO L93 Difference]: Finished difference Result 51794 states and 123670 transitions. [2021-08-21 12:02:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:02:14,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:02:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:14,919 INFO L225 Difference]: With dead ends: 51794 [2021-08-21 12:02:14,919 INFO L226 Difference]: Without dead ends: 51790 [2021-08-21 12:02:14,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:02:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51790 states. [2021-08-21 12:02:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51790 to 51361. [2021-08-21 12:02:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51361 states, 51360 states have (on average 2.3916082554517133) internal successors, (122833), 51360 states have internal predecessors, (122833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51361 states to 51361 states and 122833 transitions. [2021-08-21 12:02:15,994 INFO L78 Accepts]: Start accepts. Automaton has 51361 states and 122833 transitions. Word has length 39 [2021-08-21 12:02:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:15,994 INFO L470 AbstractCegarLoop]: Abstraction has 51361 states and 122833 transitions. [2021-08-21 12:02:15,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 51361 states and 122833 transitions. [2021-08-21 12:02:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:02:16,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:16,019 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:16,043 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 12:02:16,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:16,220 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:16,220 INFO L82 PathProgramCache]: Analyzing trace with hash 410110102, now seen corresponding path program 98 times [2021-08-21 12:02:16,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:16,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724159528] [2021-08-21 12:02:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:16,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:02:16,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:16,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724159528] [2021-08-21 12:02:16,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724159528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:16,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853918933] [2021-08-21 12:02:16,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:16,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:16,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:16,264 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 12:02:16,265 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 12:02:19,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:19,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:02:19,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:02:19,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853918933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:19,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:19,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:02:19,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671313544] [2021-08-21 12:02:19,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:02:19,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:19,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:02:19,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:02:19,109 INFO L87 Difference]: Start difference. First operand 51361 states and 122833 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:19,349 INFO L93 Difference]: Finished difference Result 53808 states and 127704 transitions. [2021-08-21 12:02:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:19,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:02:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:19,467 INFO L225 Difference]: With dead ends: 53808 [2021-08-21 12:02:19,467 INFO L226 Difference]: Without dead ends: 53805 [2021-08-21 12:02:19,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:02:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53805 states. [2021-08-21 12:02:20,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53805 to 52349. [2021-08-21 12:02:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52349 states, 52348 states have (on average 2.3850576908382366) internal successors, (124853), 52348 states have internal predecessors, (124853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:20,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52349 states to 52349 states and 124853 transitions. [2021-08-21 12:02:20,459 INFO L78 Accepts]: Start accepts. Automaton has 52349 states and 124853 transitions. Word has length 39 [2021-08-21 12:02:20,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:20,460 INFO L470 AbstractCegarLoop]: Abstraction has 52349 states and 124853 transitions. [2021-08-21 12:02:20,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:20,460 INFO L276 IsEmpty]: Start isEmpty. Operand 52349 states and 124853 transitions. [2021-08-21 12:02:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:02:20,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:20,484 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:20,507 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 12:02:20,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 12:02:20,685 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:20,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:20,685 INFO L82 PathProgramCache]: Analyzing trace with hash 875424144, now seen corresponding path program 99 times [2021-08-21 12:02:20,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:20,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276165469] [2021-08-21 12:02:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:20,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:20,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:20,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276165469] [2021-08-21 12:02:20,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276165469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:20,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969506068] [2021-08-21 12:02:20,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:20,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:20,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:20,724 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 12:02:20,724 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 12:02:23,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:02:23,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:23,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:02:23,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:02:23,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969506068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:23,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:23,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:02:23,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980878016] [2021-08-21 12:02:23,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:02:23,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:23,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:02:23,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:02:23,597 INFO L87 Difference]: Start difference. First operand 52349 states and 124853 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:23,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:23,824 INFO L93 Difference]: Finished difference Result 52855 states and 124721 transitions. [2021-08-21 12:02:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:23,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:02:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:23,925 INFO L225 Difference]: With dead ends: 52855 [2021-08-21 12:02:23,925 INFO L226 Difference]: Without dead ends: 52852 [2021-08-21 12:02:23,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:23,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52852 states. [2021-08-21 12:02:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52852 to 50549. [2021-08-21 12:02:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50549 states, 50548 states have (on average 2.3744163962965894) internal successors, (120022), 50548 states have internal predecessors, (120022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50549 states to 50549 states and 120022 transitions. [2021-08-21 12:02:24,833 INFO L78 Accepts]: Start accepts. Automaton has 50549 states and 120022 transitions. Word has length 39 [2021-08-21 12:02:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:24,833 INFO L470 AbstractCegarLoop]: Abstraction has 50549 states and 120022 transitions. [2021-08-21 12:02:24,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 50549 states and 120022 transitions. [2021-08-21 12:02:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:02:24,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:24,857 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:24,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:25,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:25,057 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:25,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:25,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1935502256, now seen corresponding path program 100 times [2021-08-21 12:02:25,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:25,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486350584] [2021-08-21 12:02:25,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:25,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:25,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:25,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486350584] [2021-08-21 12:02:25,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486350584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:25,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711868591] [2021-08-21 12:02:25,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:25,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:25,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:25,099 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 12:02:25,100 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 12:02:28,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:28,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:28,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:02:28,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:02:28,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711868591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:28,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:28,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:02:28,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720459085] [2021-08-21 12:02:28,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:02:28,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:02:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:02:28,116 INFO L87 Difference]: Start difference. First operand 50549 states and 120022 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:28,355 INFO L93 Difference]: Finished difference Result 50891 states and 120586 transitions. [2021-08-21 12:02:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:28,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:02:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:28,456 INFO L225 Difference]: With dead ends: 50891 [2021-08-21 12:02:28,457 INFO L226 Difference]: Without dead ends: 50871 [2021-08-21 12:02:28,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:02:28,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50871 states. [2021-08-21 12:02:29,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50871 to 50523. [2021-08-21 12:02:29,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50523 states, 50522 states have (on average 2.3704326827916553) internal successors, (119759), 50522 states have internal predecessors, (119759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50523 states to 50523 states and 119759 transitions. [2021-08-21 12:02:29,308 INFO L78 Accepts]: Start accepts. Automaton has 50523 states and 119759 transitions. Word has length 39 [2021-08-21 12:02:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:29,308 INFO L470 AbstractCegarLoop]: Abstraction has 50523 states and 119759 transitions. [2021-08-21 12:02:29,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 50523 states and 119759 transitions. [2021-08-21 12:02:29,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:02:29,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:29,332 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:29,355 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 12:02:29,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:29,537 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:29,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1358420656, now seen corresponding path program 101 times [2021-08-21 12:02:29,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:29,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832026381] [2021-08-21 12:02:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:29,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:29,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:29,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832026381] [2021-08-21 12:02:29,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832026381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:29,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360500035] [2021-08-21 12:02:29,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:29,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:29,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:29,575 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 12:02:29,576 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 12:02:32,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:02:32,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:32,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:02:32,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:02:32,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360500035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:32,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:32,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:02:32,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909758636] [2021-08-21 12:02:32,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:02:32,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:32,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:02:32,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:02:32,532 INFO L87 Difference]: Start difference. First operand 50523 states and 119759 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 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 12:02:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:32,743 INFO L93 Difference]: Finished difference Result 51054 states and 120870 transitions. [2021-08-21 12:02:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:02:32,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:02:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:32,862 INFO L225 Difference]: With dead ends: 51054 [2021-08-21 12:02:32,862 INFO L226 Difference]: Without dead ends: 51050 [2021-08-21 12:02:32,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:02:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51050 states. [2021-08-21 12:02:33,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51050 to 50840. [2021-08-21 12:02:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50840 states, 50839 states have (on average 2.3698341824190092) internal successors, (120480), 50839 states have internal predecessors, (120480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50840 states to 50840 states and 120480 transitions. [2021-08-21 12:02:33,859 INFO L78 Accepts]: Start accepts. Automaton has 50840 states and 120480 transitions. Word has length 39 [2021-08-21 12:02:33,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:33,860 INFO L470 AbstractCegarLoop]: Abstraction has 50840 states and 120480 transitions. [2021-08-21 12:02:33,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 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 12:02:33,860 INFO L276 IsEmpty]: Start isEmpty. Operand 50840 states and 120480 transitions. [2021-08-21 12:02:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:02:33,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:33,880 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:33,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:34,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:34,081 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1763788396, now seen corresponding path program 102 times [2021-08-21 12:02:34,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:34,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840425174] [2021-08-21 12:02:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:34,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:34,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:34,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840425174] [2021-08-21 12:02:34,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840425174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:34,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387492457] [2021-08-21 12:02:34,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:34,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:34,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:34,117 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 12:02:34,121 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 12:02:36,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:02:36,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:36,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:02:36,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:02:36,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387492457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:36,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:36,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:02:36,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428175655] [2021-08-21 12:02:36,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:02:36,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:36,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:02:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:02:36,959 INFO L87 Difference]: Start difference. First operand 50840 states and 120480 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 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 12:02:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:37,173 INFO L93 Difference]: Finished difference Result 52488 states and 123817 transitions. [2021-08-21 12:02:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:37,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:02:37,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:37,276 INFO L225 Difference]: With dead ends: 52488 [2021-08-21 12:02:37,276 INFO L226 Difference]: Without dead ends: 52485 [2021-08-21 12:02:37,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:02:37,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52485 states. [2021-08-21 12:02:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52485 to 51238. [2021-08-21 12:02:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51238 states, 51237 states have (on average 2.3674493042137517) internal successors, (121301), 51237 states have internal predecessors, (121301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51238 states to 51238 states and 121301 transitions. [2021-08-21 12:02:38,143 INFO L78 Accepts]: Start accepts. Automaton has 51238 states and 121301 transitions. Word has length 39 [2021-08-21 12:02:38,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:38,143 INFO L470 AbstractCegarLoop]: Abstraction has 51238 states and 121301 transitions. [2021-08-21 12:02:38,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 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 12:02:38,143 INFO L276 IsEmpty]: Start isEmpty. Operand 51238 states and 121301 transitions. [2021-08-21 12:02:38,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:02:38,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:38,165 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:38,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 12:02:38,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 12:02:38,366 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:38,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1298474354, now seen corresponding path program 103 times [2021-08-21 12:02:38,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:38,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867474002] [2021-08-21 12:02:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:38,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:02:38,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:38,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867474002] [2021-08-21 12:02:38,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867474002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:38,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178056611] [2021-08-21 12:02:38,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:38,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:38,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:38,412 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 12:02:38,432 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 12:02:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:41,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:02:41,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:02:41,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178056611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:41,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:41,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 12:02:41,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712165641] [2021-08-21 12:02:41,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:02:41,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:41,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:02:41,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:02:41,484 INFO L87 Difference]: Start difference. First operand 51238 states and 121301 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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 12:02:41,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:41,721 INFO L93 Difference]: Finished difference Result 52380 states and 123468 transitions. [2021-08-21 12:02:41,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:02:41,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:02:41,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:41,821 INFO L225 Difference]: With dead ends: 52380 [2021-08-21 12:02:41,822 INFO L226 Difference]: Without dead ends: 52368 [2021-08-21 12:02:41,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:41,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52368 states. [2021-08-21 12:02:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52368 to 51650. [2021-08-21 12:02:42,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51650 states, 51649 states have (on average 2.361807585819667) internal successors, (121985), 51649 states have internal predecessors, (121985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51650 states to 51650 states and 121985 transitions. [2021-08-21 12:02:42,685 INFO L78 Accepts]: Start accepts. Automaton has 51650 states and 121985 transitions. Word has length 39 [2021-08-21 12:02:42,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:42,685 INFO L470 AbstractCegarLoop]: Abstraction has 51650 states and 121985 transitions. [2021-08-21 12:02:42,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 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 12:02:42,685 INFO L276 IsEmpty]: Start isEmpty. Operand 51650 states and 121985 transitions. [2021-08-21 12:02:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 12:02:42,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:42,880 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:42,905 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 12:02:43,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 12:02:43,093 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1663842512, now seen corresponding path program 104 times [2021-08-21 12:02:43,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:43,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341886158] [2021-08-21 12:02:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:43,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:43,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:43,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341886158] [2021-08-21 12:02:43,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341886158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:43,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117129579] [2021-08-21 12:02:43,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:43,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:43,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:43,135 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 12:02:43,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 12:02:45,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:45,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:45,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:02:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:46,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117129579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:46,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:46,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:02:46,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953268407] [2021-08-21 12:02:46,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:02:46,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:46,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:02:46,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:02:46,005 INFO L87 Difference]: Start difference. First operand 51650 states and 121985 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 12:02:46,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:46,244 INFO L93 Difference]: Finished difference Result 51895 states and 122112 transitions. [2021-08-21 12:02:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:46,245 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 12:02:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:46,342 INFO L225 Difference]: With dead ends: 51895 [2021-08-21 12:02:46,342 INFO L226 Difference]: Without dead ends: 51883 [2021-08-21 12:02:46,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:02:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51883 states. [2021-08-21 12:02:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51883 to 50789. [2021-08-21 12:02:47,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50789 states, 50788 states have (on average 2.3598684728676065) internal successors, (119853), 50788 states have internal predecessors, (119853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50789 states to 50789 states and 119853 transitions. [2021-08-21 12:02:47,168 INFO L78 Accepts]: Start accepts. Automaton has 50789 states and 119853 transitions. Word has length 39 [2021-08-21 12:02:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:47,168 INFO L470 AbstractCegarLoop]: Abstraction has 50789 states and 119853 transitions. [2021-08-21 12:02:47,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 12:02:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 50789 states and 119853 transitions. [2021-08-21 12:02:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 12:02:47,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:47,192 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:47,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 12:02:47,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 12:02:47,393 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:47,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1307111494, now seen corresponding path program 7 times [2021-08-21 12:02:47,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:47,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147728070] [2021-08-21 12:02:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:47,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-21 12:02:47,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:47,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147728070] [2021-08-21 12:02:47,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147728070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:47,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231750319] [2021-08-21 12:02:47,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:47,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:47,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:47,509 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:47,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 12:02:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:50,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:02:50,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-21 12:02:50,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231750319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:50,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:50,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 12:02:50,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845214215] [2021-08-21 12:02:50,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:02:50,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:50,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:02:50,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:02:50,715 INFO L87 Difference]: Start difference. First operand 50789 states and 119853 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:51,169 INFO L93 Difference]: Finished difference Result 50941 states and 120174 transitions. [2021-08-21 12:02:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:02:51,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 12:02:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:51,272 INFO L225 Difference]: With dead ends: 50941 [2021-08-21 12:02:51,272 INFO L226 Difference]: Without dead ends: 50818 [2021-08-21 12:02:51,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:02:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50818 states. [2021-08-21 12:02:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50818 to 50804. [2021-08-21 12:02:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50804 states, 50803 states have (on average 2.3597622187666083) internal successors, (119883), 50803 states have internal predecessors, (119883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:52,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50804 states to 50804 states and 119883 transitions. [2021-08-21 12:02:52,237 INFO L78 Accepts]: Start accepts. Automaton has 50804 states and 119883 transitions. Word has length 40 [2021-08-21 12:02:52,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:52,237 INFO L470 AbstractCegarLoop]: Abstraction has 50804 states and 119883 transitions. [2021-08-21 12:02:52,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:52,238 INFO L276 IsEmpty]: Start isEmpty. Operand 50804 states and 119883 transitions. [2021-08-21 12:02:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:52,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:52,260 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:52,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:52,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 12:02:52,460 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:52,461 INFO L82 PathProgramCache]: Analyzing trace with hash -82315980, now seen corresponding path program 105 times [2021-08-21 12:02:52,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:52,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030591577] [2021-08-21 12:02:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:52,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:02:52,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:52,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030591577] [2021-08-21 12:02:52,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030591577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:52,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877053246] [2021-08-21 12:02:52,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:52,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:52,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:52,533 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:52,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 12:02:55,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:02:55,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:55,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:02:55,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:02:55,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877053246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:55,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:55,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:02:55,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699954691] [2021-08-21 12:02:55,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:02:55,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:55,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:02:55,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:55,510 INFO L87 Difference]: Start difference. First operand 50804 states and 119883 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 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 12:02:55,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:55,909 INFO L93 Difference]: Finished difference Result 54165 states and 126813 transitions. [2021-08-21 12:02:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:02:55,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:02:55,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:56,018 INFO L225 Difference]: With dead ends: 54165 [2021-08-21 12:02:56,019 INFO L226 Difference]: Without dead ends: 54165 [2021-08-21 12:02:56,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:02:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54165 states. [2021-08-21 12:02:56,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54165 to 36411. [2021-08-21 12:02:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36411 states, 36410 states have (on average 2.3365558912386706) internal successors, (85074), 36410 states have internal predecessors, (85074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:56,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36411 states to 36411 states and 85074 transitions. [2021-08-21 12:02:56,758 INFO L78 Accepts]: Start accepts. Automaton has 36411 states and 85074 transitions. Word has length 41 [2021-08-21 12:02:56,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:56,758 INFO L470 AbstractCegarLoop]: Abstraction has 36411 states and 85074 transitions. [2021-08-21 12:02:56,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 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 12:02:56,758 INFO L276 IsEmpty]: Start isEmpty. Operand 36411 states and 85074 transitions. [2021-08-21 12:02:56,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:56,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:56,780 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:56,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:56,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:56,997 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:56,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1495522452, now seen corresponding path program 106 times [2021-08-21 12:02:56,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:56,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5738539] [2021-08-21 12:02:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:56,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:02:57,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:57,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5738539] [2021-08-21 12:02:57,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5738539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:57,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872091167] [2021-08-21 12:02:57,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:57,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:57,073 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:57,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 12:03:00,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:03:00,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:00,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:03:00,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:03:00,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872091167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:00,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:00,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:03:00,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051454174] [2021-08-21 12:03:00,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:03:00,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:00,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:03:00,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:00,190 INFO L87 Difference]: Start difference. First operand 36411 states and 85074 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 12:03:00,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:00,474 INFO L93 Difference]: Finished difference Result 34622 states and 78133 transitions. [2021-08-21 12:03:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:03:00,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) Word has length 41 [2021-08-21 12:03:00,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:00,535 INFO L225 Difference]: With dead ends: 34622 [2021-08-21 12:03:00,535 INFO L226 Difference]: Without dead ends: 34550 [2021-08-21 12:03:00,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:03:00,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2021-08-21 12:03:00,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 32785. [2021-08-21 12:03:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32785 states, 32784 states have (on average 2.226634943875061) internal successors, (72998), 32784 states have internal predecessors, (72998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32785 states to 32785 states and 72998 transitions. [2021-08-21 12:03:01,034 INFO L78 Accepts]: Start accepts. Automaton has 32785 states and 72998 transitions. Word has length 41 [2021-08-21 12:03:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:01,034 INFO L470 AbstractCegarLoop]: Abstraction has 32785 states and 72998 transitions. [2021-08-21 12:03:01,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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 12:03:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32785 states and 72998 transitions. [2021-08-21 12:03:01,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:03:01,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:01,057 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:01,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-21 12:03:01,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:01,258 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:01,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1555357781, now seen corresponding path program 107 times [2021-08-21 12:03:01,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:01,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714528899] [2021-08-21 12:03:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:01,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:01,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:01,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714528899] [2021-08-21 12:03:01,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714528899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:01,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644115485] [2021-08-21 12:03:01,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:03:01,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:01,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:01,467 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:01,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 12:03:04,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:03:04,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:04,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:03:04,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:04,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644115485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:04,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:04,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-21 12:03:04,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949858967] [2021-08-21 12:03:04,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:03:04,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:04,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:03:04,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:04,724 INFO L87 Difference]: Start difference. First operand 32785 states and 72998 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 12:03:05,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:05,386 INFO L93 Difference]: Finished difference Result 33955 states and 75388 transitions. [2021-08-21 12:03:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:03:05,386 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 42 [2021-08-21 12:03:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:05,438 INFO L225 Difference]: With dead ends: 33955 [2021-08-21 12:03:05,438 INFO L226 Difference]: Without dead ends: 33895 [2021-08-21 12:03:05,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:03:05,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33895 states. [2021-08-21 12:03:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33895 to 33327. [2021-08-21 12:03:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33327 states, 33326 states have (on average 2.2281701974434376) internal successors, (74256), 33326 states have internal predecessors, (74256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33327 states to 33327 states and 74256 transitions. [2021-08-21 12:03:05,882 INFO L78 Accepts]: Start accepts. Automaton has 33327 states and 74256 transitions. Word has length 42 [2021-08-21 12:03:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:05,882 INFO L470 AbstractCegarLoop]: Abstraction has 33327 states and 74256 transitions. [2021-08-21 12:03:05,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 12:03:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 33327 states and 74256 transitions. [2021-08-21 12:03:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:03:05,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:05,904 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:05,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 12:03:06,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-21 12:03:06,105 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:06,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1125678621, now seen corresponding path program 108 times [2021-08-21 12:03:06,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:06,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473844691] [2021-08-21 12:03:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:06,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:06,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:06,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473844691] [2021-08-21 12:03:06,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473844691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:06,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555761761] [2021-08-21 12:03:06,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:03:06,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:06,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:06,303 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:06,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 12:03:09,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:03:09,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:09,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:03:09,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:09,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555761761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:09,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:09,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-21 12:03:09,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833942420] [2021-08-21 12:03:09,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:03:09,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:09,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:03:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:09,600 INFO L87 Difference]: Start difference. First operand 33327 states and 74256 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 12:03:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:10,290 INFO L93 Difference]: Finished difference Result 34237 states and 76081 transitions. [2021-08-21 12:03:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:03:10,290 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 42 [2021-08-21 12:03:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:10,344 INFO L225 Difference]: With dead ends: 34237 [2021-08-21 12:03:10,344 INFO L226 Difference]: Without dead ends: 34177 [2021-08-21 12:03:10,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 520.6ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:03:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34177 states. [2021-08-21 12:03:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34177 to 33689. [2021-08-21 12:03:10,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33689 states, 33688 states have (on average 2.2294585609118975) internal successors, (75106), 33688 states have internal predecessors, (75106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33689 states to 33689 states and 75106 transitions. [2021-08-21 12:03:10,824 INFO L78 Accepts]: Start accepts. Automaton has 33689 states and 75106 transitions. Word has length 42 [2021-08-21 12:03:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:10,824 INFO L470 AbstractCegarLoop]: Abstraction has 33689 states and 75106 transitions. [2021-08-21 12:03:10,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 12:03:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 33689 states and 75106 transitions. [2021-08-21 12:03:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:03:10,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:10,845 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:10,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 12:03:11,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:11,047 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:11,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1342500779, now seen corresponding path program 109 times [2021-08-21 12:03:11,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:11,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630541713] [2021-08-21 12:03:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:11,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:11,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:11,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630541713] [2021-08-21 12:03:11,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630541713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:11,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749294465] [2021-08-21 12:03:11,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:03:11,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:11,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:11,237 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:11,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 12:03:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:14,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:03:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:14,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749294465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:14,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:14,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-21 12:03:14,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687344041] [2021-08-21 12:03:14,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:03:14,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:14,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:03:14,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:03:14,521 INFO L87 Difference]: Start difference. First operand 33689 states and 75106 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:15,248 INFO L93 Difference]: Finished difference Result 35020 states and 77856 transitions. [2021-08-21 12:03:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:03:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:03:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:15,306 INFO L225 Difference]: With dead ends: 35020 [2021-08-21 12:03:15,306 INFO L226 Difference]: Without dead ends: 34968 [2021-08-21 12:03:15,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:03:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34968 states. [2021-08-21 12:03:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34968 to 33824. [2021-08-21 12:03:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33824 states, 33823 states have (on average 2.2299618602725957) internal successors, (75424), 33823 states have internal predecessors, (75424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33824 states to 33824 states and 75424 transitions. [2021-08-21 12:03:15,790 INFO L78 Accepts]: Start accepts. Automaton has 33824 states and 75424 transitions. Word has length 42 [2021-08-21 12:03:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:15,791 INFO L470 AbstractCegarLoop]: Abstraction has 33824 states and 75424 transitions. [2021-08-21 12:03:15,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 33824 states and 75424 transitions. [2021-08-21 12:03:15,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:03:15,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:15,812 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:15,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 12:03:16,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:16,012 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash 80278243, now seen corresponding path program 110 times [2021-08-21 12:03:16,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:16,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208606185] [2021-08-21 12:03:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:16,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:16,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:16,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208606185] [2021-08-21 12:03:16,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208606185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:16,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056802350] [2021-08-21 12:03:16,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:16,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:16,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:16,193 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:16,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 12:03:19,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:19,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:19,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:03:19,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:19,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056802350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:19,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:19,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-21 12:03:19,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424152738] [2021-08-21 12:03:19,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:03:19,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:19,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:03:19,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:19,587 INFO L87 Difference]: Start difference. First operand 33824 states and 75424 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:03:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:20,047 INFO L93 Difference]: Finished difference Result 35348 states and 78730 transitions. [2021-08-21 12:03:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:03:20,047 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:03:20,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:20,108 INFO L225 Difference]: With dead ends: 35348 [2021-08-21 12:03:20,108 INFO L226 Difference]: Without dead ends: 35287 [2021-08-21 12:03:20,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:03:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35287 states. [2021-08-21 12:03:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35287 to 34771. [2021-08-21 12:03:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34771 states, 34770 states have (on average 2.23264308311763) internal successors, (77629), 34770 states have internal predecessors, (77629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34771 states to 34771 states and 77629 transitions. [2021-08-21 12:03:20,630 INFO L78 Accepts]: Start accepts. Automaton has 34771 states and 77629 transitions. Word has length 42 [2021-08-21 12:03:20,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:20,631 INFO L470 AbstractCegarLoop]: Abstraction has 34771 states and 77629 transitions. [2021-08-21 12:03:20,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:03:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 34771 states and 77629 transitions. [2021-08-21 12:03:20,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:03:20,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:20,653 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:20,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:20,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:20,854 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:20,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:20,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2095685291, now seen corresponding path program 111 times [2021-08-21 12:03:20,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:20,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189178526] [2021-08-21 12:03:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:20,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:21,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:21,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189178526] [2021-08-21 12:03:21,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189178526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:21,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909428489] [2021-08-21 12:03:21,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:21,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:21,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:21,038 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:21,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 12:03:23,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:03:23,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:23,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:03:23,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:24,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909428489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:24,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:24,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:03:24,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371640738] [2021-08-21 12:03:24,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:03:24,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:03:24,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:24,483 INFO L87 Difference]: Start difference. First operand 34771 states and 77629 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 12:03:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:25,245 INFO L93 Difference]: Finished difference Result 37628 states and 83716 transitions. [2021-08-21 12:03:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:03:25,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) Word has length 42 [2021-08-21 12:03:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:25,310 INFO L225 Difference]: With dead ends: 37628 [2021-08-21 12:03:25,311 INFO L226 Difference]: Without dead ends: 37564 [2021-08-21 12:03:25,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:03:25,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37564 states. [2021-08-21 12:03:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37564 to 36693. [2021-08-21 12:03:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36693 states, 36692 states have (on average 2.234928594789055) internal successors, (82004), 36692 states have internal predecessors, (82004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36693 states to 36693 states and 82004 transitions. [2021-08-21 12:03:25,862 INFO L78 Accepts]: Start accepts. Automaton has 36693 states and 82004 transitions. Word has length 42 [2021-08-21 12:03:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:25,862 INFO L470 AbstractCegarLoop]: Abstraction has 36693 states and 82004 transitions. [2021-08-21 12:03:25,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 12:03:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 36693 states and 82004 transitions. [2021-08-21 12:03:25,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:03:25,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:25,888 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:25,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-21 12:03:26,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:26,089 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:26,090 INFO L82 PathProgramCache]: Analyzing trace with hash -160683887, now seen corresponding path program 112 times [2021-08-21 12:03:26,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:26,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551325785] [2021-08-21 12:03:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:26,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:26,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:26,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551325785] [2021-08-21 12:03:26,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551325785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:26,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655256246] [2021-08-21 12:03:26,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:03:26,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:26,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:26,279 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:26,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 12:03:29,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:03:29,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:29,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:03:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:29,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655256246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:29,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:29,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-21 12:03:29,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719889575] [2021-08-21 12:03:29,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:03:29,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:03:29,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:03:29,755 INFO L87 Difference]: Start difference. First operand 36693 states and 82004 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:30,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:30,442 INFO L93 Difference]: Finished difference Result 37468 states and 83561 transitions. [2021-08-21 12:03:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:03:30,442 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:03:30,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:30,506 INFO L225 Difference]: With dead ends: 37468 [2021-08-21 12:03:30,506 INFO L226 Difference]: Without dead ends: 37424 [2021-08-21 12:03:30,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 459.5ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:03:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37424 states. [2021-08-21 12:03:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37424 to 36988. [2021-08-21 12:03:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36988 states, 36987 states have (on average 2.2359207289047505) internal successors, (82700), 36987 states have internal predecessors, (82700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:31,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36988 states to 36988 states and 82700 transitions. [2021-08-21 12:03:31,030 INFO L78 Accepts]: Start accepts. Automaton has 36988 states and 82700 transitions. Word has length 42 [2021-08-21 12:03:31,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:31,030 INFO L470 AbstractCegarLoop]: Abstraction has 36988 states and 82700 transitions. [2021-08-21 12:03:31,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:31,030 INFO L276 IsEmpty]: Start isEmpty. Operand 36988 states and 82700 transitions. [2021-08-21 12:03:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:03:31,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:31,054 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:31,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 12:03:31,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 12:03:31,255 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:31,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1739769735, now seen corresponding path program 113 times [2021-08-21 12:03:31,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:31,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914369449] [2021-08-21 12:03:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:31,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:31,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:31,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914369449] [2021-08-21 12:03:31,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914369449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:31,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722176472] [2021-08-21 12:03:31,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:03:31,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:31,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:31,450 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:31,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 12:03:34,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:03:34,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:34,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:03:34,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:34,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722176472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:34,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:34,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-21 12:03:34,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499213018] [2021-08-21 12:03:34,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:03:34,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:34,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:03:34,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:34,896 INFO L87 Difference]: Start difference. First operand 36988 states and 82700 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 12:03:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:35,727 INFO L93 Difference]: Finished difference Result 37883 states and 84505 transitions. [2021-08-21 12:03:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:03:35,727 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 42 [2021-08-21 12:03:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:35,783 INFO L225 Difference]: With dead ends: 37883 [2021-08-21 12:03:35,783 INFO L226 Difference]: Without dead ends: 37825 [2021-08-21 12:03:35,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:03:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37825 states. [2021-08-21 12:03:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37825 to 37336. [2021-08-21 12:03:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37336 states, 37335 states have (on average 2.2370162046337216) internal successors, (83519), 37335 states have internal predecessors, (83519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37336 states to 37336 states and 83519 transitions. [2021-08-21 12:03:36,293 INFO L78 Accepts]: Start accepts. Automaton has 37336 states and 83519 transitions. Word has length 42 [2021-08-21 12:03:36,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:36,293 INFO L470 AbstractCegarLoop]: Abstraction has 37336 states and 83519 transitions. [2021-08-21 12:03:36,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 12:03:36,293 INFO L276 IsEmpty]: Start isEmpty. Operand 37336 states and 83519 transitions. [2021-08-21 12:03:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:03:36,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:36,317 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:36,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 12:03:36,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 12:03:36,518 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:36,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:36,518 INFO L82 PathProgramCache]: Analyzing trace with hash 728409665, now seen corresponding path program 114 times [2021-08-21 12:03:36,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:36,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622214541] [2021-08-21 12:03:36,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:36,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:36,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:36,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622214541] [2021-08-21 12:03:36,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622214541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:36,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821022377] [2021-08-21 12:03:36,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:03:36,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:36,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:36,707 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:36,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 12:03:39,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:03:39,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:39,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:03:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:40,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821022377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:40,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:40,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-21 12:03:40,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955519675] [2021-08-21 12:03:40,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:03:40,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:40,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:03:40,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:40,162 INFO L87 Difference]: Start difference. First operand 37336 states and 83519 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:40,970 INFO L93 Difference]: Finished difference Result 42560 states and 95111 transitions. [2021-08-21 12:03:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:03:40,970 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:03:40,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:41,044 INFO L225 Difference]: With dead ends: 42560 [2021-08-21 12:03:41,044 INFO L226 Difference]: Without dead ends: 42505 [2021-08-21 12:03:41,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 523.0ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:03:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42505 states. [2021-08-21 12:03:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42505 to 41364. [2021-08-21 12:03:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41364 states, 41363 states have (on average 2.2458477383168534) internal successors, (92895), 41363 states have internal predecessors, (92895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41364 states to 41364 states and 92895 transitions. [2021-08-21 12:03:41,723 INFO L78 Accepts]: Start accepts. Automaton has 41364 states and 92895 transitions. Word has length 42 [2021-08-21 12:03:41,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:41,723 INFO L470 AbstractCegarLoop]: Abstraction has 41364 states and 92895 transitions. [2021-08-21 12:03:41,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:41,723 INFO L276 IsEmpty]: Start isEmpty. Operand 41364 states and 92895 transitions. [2021-08-21 12:03:41,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:03:41,748 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:41,749 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:41,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:41,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:41,949 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:41,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:41,949 INFO L82 PathProgramCache]: Analyzing trace with hash -533812871, now seen corresponding path program 115 times [2021-08-21 12:03:41,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:41,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832361940] [2021-08-21 12:03:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:41,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:42,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:42,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832361940] [2021-08-21 12:03:42,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832361940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:42,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734957613] [2021-08-21 12:03:42,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:03:42,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:42,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:42,133 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:42,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 12:03:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:45,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:03:45,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:45,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734957613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:45,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:45,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-21 12:03:45,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668171164] [2021-08-21 12:03:45,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:03:45,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:03:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:03:45,556 INFO L87 Difference]: Start difference. First operand 41364 states and 92895 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:03:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:46,096 INFO L93 Difference]: Finished difference Result 42177 states and 94600 transitions. [2021-08-21 12:03:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:03:46,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:03:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:46,181 INFO L225 Difference]: With dead ends: 42177 [2021-08-21 12:03:46,181 INFO L226 Difference]: Without dead ends: 42122 [2021-08-21 12:03:46,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:03:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42122 states. [2021-08-21 12:03:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42122 to 41392. [2021-08-21 12:03:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41392 states, 41391 states have (on average 2.2448599937184412) internal successors, (92917), 41391 states have internal predecessors, (92917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41392 states to 41392 states and 92917 transitions. [2021-08-21 12:03:46,886 INFO L78 Accepts]: Start accepts. Automaton has 41392 states and 92917 transitions. Word has length 42 [2021-08-21 12:03:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:46,886 INFO L470 AbstractCegarLoop]: Abstraction has 41392 states and 92917 transitions. [2021-08-21 12:03:46,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:03:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 41392 states and 92917 transitions. [2021-08-21 12:03:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:03:46,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:46,911 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:46,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:47,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 12:03:47,112 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:47,112 INFO L82 PathProgramCache]: Analyzing trace with hash 214136999, now seen corresponding path program 116 times [2021-08-21 12:03:47,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:47,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915434390] [2021-08-21 12:03:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:47,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:47,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:47,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915434390] [2021-08-21 12:03:47,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915434390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:47,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054293965] [2021-08-21 12:03:47,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:47,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:47,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:47,300 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:47,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 12:03:50,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:50,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:50,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:03:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:03:50,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054293965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:50,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:50,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:03:50,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563816013] [2021-08-21 12:03:50,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:03:50,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:03:50,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:50,914 INFO L87 Difference]: Start difference. First operand 41392 states and 92917 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 12:03:51,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:51,510 INFO L93 Difference]: Finished difference Result 43200 states and 96836 transitions. [2021-08-21 12:03:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:03:51,510 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 42 [2021-08-21 12:03:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:51,585 INFO L225 Difference]: With dead ends: 43200 [2021-08-21 12:03:51,586 INFO L226 Difference]: Without dead ends: 43139 [2021-08-21 12:03:51,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:03:51,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43139 states. [2021-08-21 12:03:52,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43139 to 42274. [2021-08-21 12:03:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42274 states, 42273 states have (on average 2.245641425969295) internal successors, (94930), 42273 states have internal predecessors, (94930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42274 states to 42274 states and 94930 transitions. [2021-08-21 12:03:52,232 INFO L78 Accepts]: Start accepts. Automaton has 42274 states and 94930 transitions. Word has length 42 [2021-08-21 12:03:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:52,232 INFO L470 AbstractCegarLoop]: Abstraction has 42274 states and 94930 transitions. [2021-08-21 12:03:52,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 12:03:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 42274 states and 94930 transitions. [2021-08-21 12:03:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:03:52,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:52,260 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:52,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 12:03:52,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-21 12:03:52,461 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:52,462 INFO L82 PathProgramCache]: Analyzing trace with hash -817478237, now seen corresponding path program 117 times [2021-08-21 12:03:52,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:52,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253238874] [2021-08-21 12:03:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:52,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:52,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:52,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253238874] [2021-08-21 12:03:52,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253238874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:52,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427876752] [2021-08-21 12:03:52,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:52,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:52,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:52,654 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:52,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 12:03:55,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:03:55,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:55,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:03:55,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:56,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427876752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:56,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:56,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:03:56,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240002436] [2021-08-21 12:03:56,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:03:56,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:56,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:03:56,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:56,242 INFO L87 Difference]: Start difference. First operand 42274 states and 94930 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 12:03:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:57,103 INFO L93 Difference]: Finished difference Result 43593 states and 97722 transitions. [2021-08-21 12:03:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:03:57,104 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) Word has length 42 [2021-08-21 12:03:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:57,178 INFO L225 Difference]: With dead ends: 43593 [2021-08-21 12:03:57,178 INFO L226 Difference]: Without dead ends: 43522 [2021-08-21 12:03:57,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 556.7ms TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:03:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43522 states. [2021-08-21 12:03:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43522 to 42894. [2021-08-21 12:03:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42894 states, 42893 states have (on average 2.2458443102604155) internal successors, (96331), 42893 states have internal predecessors, (96331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42894 states to 42894 states and 96331 transitions. [2021-08-21 12:03:57,905 INFO L78 Accepts]: Start accepts. Automaton has 42894 states and 96331 transitions. Word has length 42 [2021-08-21 12:03:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:57,905 INFO L470 AbstractCegarLoop]: Abstraction has 42894 states and 96331 transitions. [2021-08-21 12:03:57,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 12:03:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 42894 states and 96331 transitions. [2021-08-21 12:03:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:03:57,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:57,934 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:57,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 12:03:58,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-21 12:03:58,137 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:58,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:58,137 INFO L82 PathProgramCache]: Analyzing trace with hash -64293725, now seen corresponding path program 118 times [2021-08-21 12:03:58,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:58,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483664728] [2021-08-21 12:03:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:58,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:58,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:58,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483664728] [2021-08-21 12:03:58,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483664728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:58,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391520478] [2021-08-21 12:03:58,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:03:58,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:58,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:58,320 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:58,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 12:04:01,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:01,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:04:01,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:04:01,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391520478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:01,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:01,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:04:01,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656809639] [2021-08-21 12:04:01,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:04:01,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:01,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:04:01,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:04:01,928 INFO L87 Difference]: Start difference. First operand 42894 states and 96331 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:02,587 INFO L93 Difference]: Finished difference Result 44838 states and 100520 transitions. [2021-08-21 12:04:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:04:02,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:04:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:02,664 INFO L225 Difference]: With dead ends: 44838 [2021-08-21 12:04:02,664 INFO L226 Difference]: Without dead ends: 44755 [2021-08-21 12:04:02,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 488.4ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:04:02,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44755 states. [2021-08-21 12:04:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44755 to 42260. [2021-08-21 12:04:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42260 states, 42259 states have (on average 2.245367850635368) internal successors, (94887), 42259 states have internal predecessors, (94887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42260 states to 42260 states and 94887 transitions. [2021-08-21 12:04:03,441 INFO L78 Accepts]: Start accepts. Automaton has 42260 states and 94887 transitions. Word has length 42 [2021-08-21 12:04:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:03,441 INFO L470 AbstractCegarLoop]: Abstraction has 42260 states and 94887 transitions. [2021-08-21 12:04:03,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:03,441 INFO L276 IsEmpty]: Start isEmpty. Operand 42260 states and 94887 transitions. [2021-08-21 12:04:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:04:03,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:03,469 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:03,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 12:04:03,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 12:04:03,669 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:03,670 INFO L82 PathProgramCache]: Analyzing trace with hash -873008797, now seen corresponding path program 119 times [2021-08-21 12:04:03,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:03,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239883603] [2021-08-21 12:04:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:03,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:03,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:03,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239883603] [2021-08-21 12:04:03,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239883603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:03,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259284360] [2021-08-21 12:04:03,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:03,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:03,857 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:03,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 12:04:07,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 12:04:07,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:07,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:04:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:04:07,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259284360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:07,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:07,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:04:07,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597868505] [2021-08-21 12:04:07,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:04:07,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:07,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:04:07,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:04:07,600 INFO L87 Difference]: Start difference. First operand 42260 states and 94887 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:08,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:08,251 INFO L93 Difference]: Finished difference Result 45004 states and 100851 transitions. [2021-08-21 12:04:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:04:08,252 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:04:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:08,332 INFO L225 Difference]: With dead ends: 45004 [2021-08-21 12:04:08,333 INFO L226 Difference]: Without dead ends: 44951 [2021-08-21 12:04:08,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:04:08,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44951 states. [2021-08-21 12:04:08,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44951 to 44047. [2021-08-21 12:04:08,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44047 states, 44046 states have (on average 2.2477182945102845) internal successors, (99003), 44046 states have internal predecessors, (99003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:09,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44047 states to 44047 states and 99003 transitions. [2021-08-21 12:04:09,034 INFO L78 Accepts]: Start accepts. Automaton has 44047 states and 99003 transitions. Word has length 42 [2021-08-21 12:04:09,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:09,034 INFO L470 AbstractCegarLoop]: Abstraction has 44047 states and 99003 transitions. [2021-08-21 12:04:09,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:09,034 INFO L276 IsEmpty]: Start isEmpty. Operand 44047 states and 99003 transitions. [2021-08-21 12:04:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:04:09,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:09,063 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:09,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 12:04:09,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:09,265 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:09,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:09,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2109650435, now seen corresponding path program 120 times [2021-08-21 12:04:09,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:09,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835428246] [2021-08-21 12:04:09,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:09,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:09,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:09,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835428246] [2021-08-21 12:04:09,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835428246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:09,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942080429] [2021-08-21 12:04:09,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:09,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:09,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:09,459 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:09,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 12:04:12,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:12,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:12,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:04:12,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:13,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942080429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:13,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:13,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:04:13,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354724126] [2021-08-21 12:04:13,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:04:13,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:13,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:04:13,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:04:13,243 INFO L87 Difference]: Start difference. First operand 44047 states and 99003 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:14,012 INFO L93 Difference]: Finished difference Result 47479 states and 106568 transitions. [2021-08-21 12:04:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:04:14,012 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:04:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:14,102 INFO L225 Difference]: With dead ends: 47479 [2021-08-21 12:04:14,102 INFO L226 Difference]: Without dead ends: 47408 [2021-08-21 12:04:14,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 465.8ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:04:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47408 states. [2021-08-21 12:04:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47408 to 43786. [2021-08-21 12:04:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43786 states, 43785 states have (on average 2.247847436336645) internal successors, (98422), 43785 states have internal predecessors, (98422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43786 states to 43786 states and 98422 transitions. [2021-08-21 12:04:14,800 INFO L78 Accepts]: Start accepts. Automaton has 43786 states and 98422 transitions. Word has length 42 [2021-08-21 12:04:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:14,800 INFO L470 AbstractCegarLoop]: Abstraction has 43786 states and 98422 transitions. [2021-08-21 12:04:14,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 43786 states and 98422 transitions. [2021-08-21 12:04:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:04:14,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:14,828 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:14,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 12:04:15,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:15,033 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash 432534051, now seen corresponding path program 121 times [2021-08-21 12:04:15,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:15,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250068964] [2021-08-21 12:04:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:15,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:15,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:15,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250068964] [2021-08-21 12:04:15,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250068964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:15,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079631564] [2021-08-21 12:04:15,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:15,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:15,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:15,341 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:15,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 12:04:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:18,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:04:18,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:18,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079631564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:18,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:18,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-21 12:04:18,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009865110] [2021-08-21 12:04:18,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:04:18,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:18,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:04:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:04:18,990 INFO L87 Difference]: Start difference. First operand 43786 states and 98422 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:19,546 INFO L93 Difference]: Finished difference Result 44309 states and 99482 transitions. [2021-08-21 12:04:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:04:19,546 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:04:19,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:19,621 INFO L225 Difference]: With dead ends: 44309 [2021-08-21 12:04:19,621 INFO L226 Difference]: Without dead ends: 44269 [2021-08-21 12:04:19,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:04:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44269 states. [2021-08-21 12:04:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44269 to 44009. [2021-08-21 12:04:20,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44009 states, 44008 states have (on average 2.2482957644064716) internal successors, (98943), 44008 states have internal predecessors, (98943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44009 states to 44009 states and 98943 transitions. [2021-08-21 12:04:20,373 INFO L78 Accepts]: Start accepts. Automaton has 44009 states and 98943 transitions. Word has length 42 [2021-08-21 12:04:20,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:20,373 INFO L470 AbstractCegarLoop]: Abstraction has 44009 states and 98943 transitions. [2021-08-21 12:04:20,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:20,373 INFO L276 IsEmpty]: Start isEmpty. Operand 44009 states and 98943 transitions. [2021-08-21 12:04:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:04:20,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:20,402 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:20,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-21 12:04:20,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-08-21 12:04:20,602 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:20,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:20,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1638490915, now seen corresponding path program 122 times [2021-08-21 12:04:20,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:20,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502234318] [2021-08-21 12:04:20,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:20,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:20,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:20,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502234318] [2021-08-21 12:04:20,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502234318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:20,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761586625] [2021-08-21 12:04:20,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:20,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:20,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:20,791 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:20,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 12:04:24,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:24,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:24,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:04:24,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:24,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761586625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:24,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:24,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-21 12:04:24,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869891957] [2021-08-21 12:04:24,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:04:24,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:04:24,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:04:24,630 INFO L87 Difference]: Start difference. First operand 44009 states and 98943 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:04:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:25,192 INFO L93 Difference]: Finished difference Result 44985 states and 100996 transitions. [2021-08-21 12:04:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:04:25,192 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:04:25,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:25,268 INFO L225 Difference]: With dead ends: 44985 [2021-08-21 12:04:25,268 INFO L226 Difference]: Without dead ends: 44934 [2021-08-21 12:04:25,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:04:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44934 states. [2021-08-21 12:04:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44934 to 44309. [2021-08-21 12:04:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44309 states, 44308 states have (on average 2.248081610544371) internal successors, (99608), 44308 states have internal predecessors, (99608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44309 states to 44309 states and 99608 transitions. [2021-08-21 12:04:25,904 INFO L78 Accepts]: Start accepts. Automaton has 44309 states and 99608 transitions. Word has length 42 [2021-08-21 12:04:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:25,904 INFO L470 AbstractCegarLoop]: Abstraction has 44309 states and 99608 transitions. [2021-08-21 12:04:25,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:04:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 44309 states and 99608 transitions. [2021-08-21 12:04:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:04:25,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:25,933 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:25,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:26,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:26,134 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1908526511, now seen corresponding path program 123 times [2021-08-21 12:04:26,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:26,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170955276] [2021-08-21 12:04:26,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:26,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:26,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:26,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170955276] [2021-08-21 12:04:26,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170955276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:26,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214949329] [2021-08-21 12:04:26,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:26,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:26,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:26,324 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:26,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 12:04:29,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:04:29,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:29,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:04:29,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:30,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214949329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:30,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:30,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:04:30,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304825419] [2021-08-21 12:04:30,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:04:30,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:04:30,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:04:30,166 INFO L87 Difference]: Start difference. First operand 44309 states and 99608 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 12:04:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:31,017 INFO L93 Difference]: Finished difference Result 49164 states and 110220 transitions. [2021-08-21 12:04:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:04:31,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) Word has length 42 [2021-08-21 12:04:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:31,103 INFO L225 Difference]: With dead ends: 49164 [2021-08-21 12:04:31,104 INFO L226 Difference]: Without dead ends: 49079 [2021-08-21 12:04:31,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:04:31,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49079 states. [2021-08-21 12:04:31,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49079 to 47944. [2021-08-21 12:04:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47944 states, 47943 states have (on average 2.2517990113259496) internal successors, (107958), 47943 states have internal predecessors, (107958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47944 states to 47944 states and 107958 transitions. [2021-08-21 12:04:31,967 INFO L78 Accepts]: Start accepts. Automaton has 47944 states and 107958 transitions. Word has length 42 [2021-08-21 12:04:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:31,967 INFO L470 AbstractCegarLoop]: Abstraction has 47944 states and 107958 transitions. [2021-08-21 12:04:31,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 12:04:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 47944 states and 107958 transitions. [2021-08-21 12:04:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:04:32,004 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:32,004 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:32,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 12:04:32,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:32,205 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:32,205 INFO L82 PathProgramCache]: Analyzing trace with hash 92603013, now seen corresponding path program 124 times [2021-08-21 12:04:32,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:32,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065551237] [2021-08-21 12:04:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:32,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:32,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:32,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065551237] [2021-08-21 12:04:32,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065551237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:32,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404904333] [2021-08-21 12:04:32,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:32,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:32,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:32,390 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:32,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 12:04:35,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:35,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:35,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:04:35,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:36,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404904333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:36,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:36,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-21 12:04:36,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397424069] [2021-08-21 12:04:36,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:04:36,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:36,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:04:36,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:04:36,359 INFO L87 Difference]: Start difference. First operand 47944 states and 107958 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:04:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:37,000 INFO L93 Difference]: Finished difference Result 48735 states and 109617 transitions. [2021-08-21 12:04:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:04:37,000 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:04:37,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:37,083 INFO L225 Difference]: With dead ends: 48735 [2021-08-21 12:04:37,083 INFO L226 Difference]: Without dead ends: 48700 [2021-08-21 12:04:37,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:04:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48700 states. [2021-08-21 12:04:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48700 to 47968. [2021-08-21 12:04:37,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47968 states, 47967 states have (on average 2.2517355682031397) internal successors, (108009), 47967 states have internal predecessors, (108009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47968 states to 47968 states and 108009 transitions. [2021-08-21 12:04:37,835 INFO L78 Accepts]: Start accepts. Automaton has 47968 states and 108009 transitions. Word has length 42 [2021-08-21 12:04:37,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:37,835 INFO L470 AbstractCegarLoop]: Abstraction has 47968 states and 108009 transitions. [2021-08-21 12:04:37,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:04:37,835 INFO L276 IsEmpty]: Start isEmpty. Operand 47968 states and 108009 transitions. [2021-08-21 12:04:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:04:37,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:37,877 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:37,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-21 12:04:38,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 12:04:38,078 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:38,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1702140955, now seen corresponding path program 125 times [2021-08-21 12:04:38,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:38,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752767484] [2021-08-21 12:04:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:38,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:38,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:38,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752767484] [2021-08-21 12:04:38,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752767484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:38,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349256139] [2021-08-21 12:04:38,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:38,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:38,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:38,258 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:38,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 12:04:41,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:04:41,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:41,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:04:41,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:42,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349256139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:42,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:42,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-08-21 12:04:42,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345510670] [2021-08-21 12:04:42,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:04:42,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:04:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:04:42,399 INFO L87 Difference]: Start difference. First operand 47968 states and 108009 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 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 12:04:43,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:43,022 INFO L93 Difference]: Finished difference Result 51644 states and 116036 transitions. [2021-08-21 12:04:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:04:43,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:04:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:43,123 INFO L225 Difference]: With dead ends: 51644 [2021-08-21 12:04:43,123 INFO L226 Difference]: Without dead ends: 51544 [2021-08-21 12:04:43,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 402.0ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:04:43,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51544 states. [2021-08-21 12:04:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51544 to 49010. [2021-08-21 12:04:43,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49010 states, 49009 states have (on average 2.252402619926952) internal successors, (110388), 49009 states have internal predecessors, (110388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49010 states to 49010 states and 110388 transitions. [2021-08-21 12:04:43,897 INFO L78 Accepts]: Start accepts. Automaton has 49010 states and 110388 transitions. Word has length 42 [2021-08-21 12:04:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:43,897 INFO L470 AbstractCegarLoop]: Abstraction has 49010 states and 110388 transitions. [2021-08-21 12:04:43,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 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 12:04:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 49010 states and 110388 transitions. [2021-08-21 12:04:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:04:43,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:43,935 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:43,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-21 12:04:44,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 12:04:44,135 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:44,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1299294989, now seen corresponding path program 126 times [2021-08-21 12:04:44,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:44,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580974562] [2021-08-21 12:04:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:44,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:44,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:44,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580974562] [2021-08-21 12:04:44,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580974562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:44,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351603255] [2021-08-21 12:04:44,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:44,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:44,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:44,316 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:44,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 12:04:48,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:48,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:48,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:04:48,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:04:48,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351603255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:48,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:48,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:04:48,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658009748] [2021-08-21 12:04:48,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:04:48,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:48,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:04:48,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:04:48,580 INFO L87 Difference]: Start difference. First operand 49010 states and 110388 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:49,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:49,206 INFO L93 Difference]: Finished difference Result 50673 states and 113916 transitions. [2021-08-21 12:04:49,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:04:49,206 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:04:49,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:49,298 INFO L225 Difference]: With dead ends: 50673 [2021-08-21 12:04:49,298 INFO L226 Difference]: Without dead ends: 50620 [2021-08-21 12:04:49,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 468.0ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:04:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50620 states. [2021-08-21 12:04:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50620 to 50130. [2021-08-21 12:04:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50130 states, 50129 states have (on average 2.2520497117437013) internal successors, (112893), 50129 states have internal predecessors, (112893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50130 states to 50130 states and 112893 transitions. [2021-08-21 12:04:50,161 INFO L78 Accepts]: Start accepts. Automaton has 50130 states and 112893 transitions. Word has length 42 [2021-08-21 12:04:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:50,161 INFO L470 AbstractCegarLoop]: Abstraction has 50130 states and 112893 transitions. [2021-08-21 12:04:50,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 50130 states and 112893 transitions. [2021-08-21 12:04:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:04:50,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:50,197 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:50,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:50,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 12:04:50,398 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:50,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:50,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1952753697, now seen corresponding path program 127 times [2021-08-21 12:04:50,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:50,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894722930] [2021-08-21 12:04:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:50,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:50,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:50,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894722930] [2021-08-21 12:04:50,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894722930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:50,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452734087] [2021-08-21 12:04:50,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:50,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:50,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:50,580 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:50,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 12:04:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:54,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:04:54,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:54,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452734087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:54,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:54,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-21 12:04:54,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349793536] [2021-08-21 12:04:54,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:04:54,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:54,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:04:54,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:04:54,752 INFO L87 Difference]: Start difference. First operand 50130 states and 112893 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:04:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:55,376 INFO L93 Difference]: Finished difference Result 50981 states and 114695 transitions. [2021-08-21 12:04:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:04:55,377 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:04:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:55,472 INFO L225 Difference]: With dead ends: 50981 [2021-08-21 12:04:55,472 INFO L226 Difference]: Without dead ends: 50938 [2021-08-21 12:04:55,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:04:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50938 states. [2021-08-21 12:04:56,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50938 to 50107. [2021-08-21 12:04:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50107 states, 50106 states have (on average 2.252165409332216) internal successors, (112847), 50106 states have internal predecessors, (112847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50107 states to 50107 states and 112847 transitions. [2021-08-21 12:04:56,287 INFO L78 Accepts]: Start accepts. Automaton has 50107 states and 112847 transitions. Word has length 42 [2021-08-21 12:04:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:56,287 INFO L470 AbstractCegarLoop]: Abstraction has 50107 states and 112847 transitions. [2021-08-21 12:04:56,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:04:56,288 INFO L276 IsEmpty]: Start isEmpty. Operand 50107 states and 112847 transitions. [2021-08-21 12:04:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:04:56,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:56,324 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:56,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-21 12:04:56,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:56,524 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:56,525 INFO L82 PathProgramCache]: Analyzing trace with hash -689225907, now seen corresponding path program 128 times [2021-08-21 12:04:56,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:56,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011371460] [2021-08-21 12:04:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:56,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:56,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:56,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011371460] [2021-08-21 12:04:56,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011371460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:56,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094481989] [2021-08-21 12:04:56,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:56,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:56,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:56,722 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:56,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 12:05:00,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:00,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:00,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:05:00,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:05:00,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094481989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:00,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:00,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-21 12:05:00,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030120513] [2021-08-21 12:05:00,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:05:00,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:00,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:05:00,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:05:00,906 INFO L87 Difference]: Start difference. First operand 50107 states and 112847 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:01,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:01,547 INFO L93 Difference]: Finished difference Result 50602 states and 113853 transitions. [2021-08-21 12:05:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:05:01,548 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:05:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:01,640 INFO L225 Difference]: With dead ends: 50602 [2021-08-21 12:05:01,640 INFO L226 Difference]: Without dead ends: 50562 [2021-08-21 12:05:01,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 453.0ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:05:01,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50562 states. [2021-08-21 12:05:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50562 to 50341. [2021-08-21 12:05:02,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50341 states, 50340 states have (on average 2.252522844656337) internal successors, (113392), 50340 states have internal predecessors, (113392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50341 states to 50341 states and 113392 transitions. [2021-08-21 12:05:02,447 INFO L78 Accepts]: Start accepts. Automaton has 50341 states and 113392 transitions. Word has length 42 [2021-08-21 12:05:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:02,447 INFO L470 AbstractCegarLoop]: Abstraction has 50341 states and 113392 transitions. [2021-08-21 12:05:02,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 50341 states and 113392 transitions. [2021-08-21 12:05:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:05:02,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:02,484 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:02,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:02,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 12:05:02,685 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:02,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1552315221, now seen corresponding path program 129 times [2021-08-21 12:05:02,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:02,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748106750] [2021-08-21 12:05:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:02,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:02,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:02,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748106750] [2021-08-21 12:05:02,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748106750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:02,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215823609] [2021-08-21 12:05:02,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:02,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:02,862 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:02,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 12:05:06,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:05:06,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:06,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:05:06,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:05:07,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215823609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:07,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:07,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-21 12:05:07,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057916377] [2021-08-21 12:05:07,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:05:07,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:07,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:05:07,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:05:07,146 INFO L87 Difference]: Start difference. First operand 50341 states and 113392 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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 12:05:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:08,215 INFO L93 Difference]: Finished difference Result 54084 states and 121478 transitions. [2021-08-21 12:05:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:05:08,215 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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) Word has length 42 [2021-08-21 12:05:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:08,315 INFO L225 Difference]: With dead ends: 54084 [2021-08-21 12:05:08,315 INFO L226 Difference]: Without dead ends: 54013 [2021-08-21 12:05:08,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 650.0ms TimeCoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:05:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54013 states. [2021-08-21 12:05:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54013 to 53169. [2021-08-21 12:05:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53169 states, 53168 states have (on average 2.254043785735781) internal successors, (119843), 53168 states have internal predecessors, (119843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53169 states to 53169 states and 119843 transitions. [2021-08-21 12:05:09,204 INFO L78 Accepts]: Start accepts. Automaton has 53169 states and 119843 transitions. Word has length 42 [2021-08-21 12:05:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:09,205 INFO L470 AbstractCegarLoop]: Abstraction has 53169 states and 119843 transitions. [2021-08-21 12:05:09,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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 12:05:09,205 INFO L276 IsEmpty]: Start isEmpty. Operand 53169 states and 119843 transitions. [2021-08-21 12:05:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:05:09,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:09,244 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:09,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-21 12:05:09,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 12:05:09,444 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:09,445 INFO L82 PathProgramCache]: Analyzing trace with hash -78601629, now seen corresponding path program 130 times [2021-08-21 12:05:09,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:09,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876368956] [2021-08-21 12:05:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:09,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:09,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:09,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876368956] [2021-08-21 12:05:09,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876368956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:09,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462852790] [2021-08-21 12:05:09,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:09,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:09,613 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:09,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 12:05:13,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:13,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:13,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:05:13,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:05:13,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462852790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:13,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:13,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-21 12:05:13,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138433066] [2021-08-21 12:05:13,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:05:13,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:13,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:05:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:05:13,934 INFO L87 Difference]: Start difference. First operand 53169 states and 119843 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) 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 12:05:14,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:14,548 INFO L93 Difference]: Finished difference Result 57178 states and 128792 transitions. [2021-08-21 12:05:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:05:14,548 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) 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 42 [2021-08-21 12:05:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:14,657 INFO L225 Difference]: With dead ends: 57178 [2021-08-21 12:05:14,657 INFO L226 Difference]: Without dead ends: 57113 [2021-08-21 12:05:14,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 422.4ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:05:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57113 states. [2021-08-21 12:05:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57113 to 52644. [2021-08-21 12:05:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52644 states, 52643 states have (on average 2.2556085329483504) internal successors, (118742), 52643 states have internal predecessors, (118742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52644 states to 52644 states and 118742 transitions. [2021-08-21 12:05:15,538 INFO L78 Accepts]: Start accepts. Automaton has 52644 states and 118742 transitions. Word has length 42 [2021-08-21 12:05:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:15,539 INFO L470 AbstractCegarLoop]: Abstraction has 52644 states and 118742 transitions. [2021-08-21 12:05:15,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) 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 12:05:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 52644 states and 118742 transitions. [2021-08-21 12:05:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:05:15,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:15,581 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:15,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:15,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:15,781 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:15,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1607845781, now seen corresponding path program 131 times [2021-08-21 12:05:15,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:15,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69372639] [2021-08-21 12:05:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:15,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:15,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:15,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69372639] [2021-08-21 12:05:15,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69372639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:15,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653842841] [2021-08-21 12:05:15,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:15,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:15,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:15,953 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:15,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 12:05:19,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:05:19,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:19,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:05:19,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:05:20,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653842841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:20,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:20,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:05:20,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855976169] [2021-08-21 12:05:20,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:05:20,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:20,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:05:20,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:05:20,329 INFO L87 Difference]: Start difference. First operand 52644 states and 118742 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:21,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:21,103 INFO L93 Difference]: Finished difference Result 54729 states and 123160 transitions. [2021-08-21 12:05:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:05:21,103 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:05:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:21,205 INFO L225 Difference]: With dead ends: 54729 [2021-08-21 12:05:21,205 INFO L226 Difference]: Without dead ends: 54629 [2021-08-21 12:05:21,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 512.9ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:05:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54629 states. [2021-08-21 12:05:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54629 to 52701. [2021-08-21 12:05:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52701 states, 52700 states have (on average 2.2552182163187857) internal successors, (118850), 52700 states have internal predecessors, (118850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:22,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52701 states to 52701 states and 118850 transitions. [2021-08-21 12:05:22,033 INFO L78 Accepts]: Start accepts. Automaton has 52701 states and 118850 transitions. Word has length 42 [2021-08-21 12:05:22,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:22,034 INFO L470 AbstractCegarLoop]: Abstraction has 52701 states and 118850 transitions. [2021-08-21 12:05:22,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 52701 states and 118850 transitions. [2021-08-21 12:05:22,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:05:22,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:22,075 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:22,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-21 12:05:22,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:22,275 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:22,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:22,275 INFO L82 PathProgramCache]: Analyzing trace with hash -475062237, now seen corresponding path program 132 times [2021-08-21 12:05:22,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:22,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609355741] [2021-08-21 12:05:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:22,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:22,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:22,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609355741] [2021-08-21 12:05:22,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609355741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:22,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809153863] [2021-08-21 12:05:22,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:05:22,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:22,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:22,670 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:22,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 12:05:26,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:05:26,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:26,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:05:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:05:26,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809153863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:26,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:26,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-08-21 12:05:26,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117113029] [2021-08-21 12:05:26,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:05:26,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:26,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:05:26,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:05:26,905 INFO L87 Difference]: Start difference. First operand 52701 states and 118850 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 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 12:05:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:27,440 INFO L93 Difference]: Finished difference Result 56271 states and 126636 transitions. [2021-08-21 12:05:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:05:27,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:05:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:27,553 INFO L225 Difference]: With dead ends: 56271 [2021-08-21 12:05:27,553 INFO L226 Difference]: Without dead ends: 56195 [2021-08-21 12:05:27,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:05:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56195 states. [2021-08-21 12:05:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56195 to 54531. [2021-08-21 12:05:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54531 states, 54530 states have (on average 2.256684393911608) internal successors, (123057), 54530 states have internal predecessors, (123057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:28,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54531 states to 54531 states and 123057 transitions. [2021-08-21 12:05:28,635 INFO L78 Accepts]: Start accepts. Automaton has 54531 states and 123057 transitions. Word has length 42 [2021-08-21 12:05:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:28,635 INFO L470 AbstractCegarLoop]: Abstraction has 54531 states and 123057 transitions. [2021-08-21 12:05:28,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 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 12:05:28,635 INFO L276 IsEmpty]: Start isEmpty. Operand 54531 states and 123057 transitions. [2021-08-21 12:05:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:05:28,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:28,675 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:28,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-21 12:05:28,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:28,875 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:28,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:28,876 INFO L82 PathProgramCache]: Analyzing trace with hash 727974827, now seen corresponding path program 133 times [2021-08-21 12:05:28,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:28,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112568155] [2021-08-21 12:05:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:28,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:29,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:29,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112568155] [2021-08-21 12:05:29,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112568155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:29,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569160496] [2021-08-21 12:05:29,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:05:29,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:29,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:29,046 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:29,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 12:05:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:32,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:05:32,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:05:33,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569160496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:33,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:33,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-08-21 12:05:33,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769408951] [2021-08-21 12:05:33,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:05:33,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:33,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:05:33,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:05:33,421 INFO L87 Difference]: Start difference. First operand 54531 states and 123057 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:33,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:33,933 INFO L93 Difference]: Finished difference Result 56394 states and 127052 transitions. [2021-08-21 12:05:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:05:33,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:05:33,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:34,042 INFO L225 Difference]: With dead ends: 56394 [2021-08-21 12:05:34,043 INFO L226 Difference]: Without dead ends: 56355 [2021-08-21 12:05:34,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:05:34,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56355 states. [2021-08-21 12:05:34,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56355 to 55760. [2021-08-21 12:05:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55760 states, 55759 states have (on average 2.2566222493229793) internal successors, (125827), 55759 states have internal predecessors, (125827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55760 states to 55760 states and 125827 transitions. [2021-08-21 12:05:35,028 INFO L78 Accepts]: Start accepts. Automaton has 55760 states and 125827 transitions. Word has length 42 [2021-08-21 12:05:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:35,029 INFO L470 AbstractCegarLoop]: Abstraction has 55760 states and 125827 transitions. [2021-08-21 12:05:35,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 55760 states and 125827 transitions. [2021-08-21 12:05:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:05:35,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:35,070 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:35,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-08-21 12:05:35,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:35,271 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:35,271 INFO L82 PathProgramCache]: Analyzing trace with hash 959710281, now seen corresponding path program 134 times [2021-08-21 12:05:35,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:35,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299170256] [2021-08-21 12:05:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:35,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:35,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:35,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299170256] [2021-08-21 12:05:35,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299170256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:35,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859270719] [2021-08-21 12:05:35,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:35,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:35,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:35,637 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:35,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 12:05:39,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:39,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:39,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:05:39,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:05:39,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859270719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:39,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:39,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-21 12:05:39,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924700537] [2021-08-21 12:05:39,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:05:39,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:39,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:05:39,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:05:39,936 INFO L87 Difference]: Start difference. First operand 55760 states and 125827 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:05:40,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:40,632 INFO L93 Difference]: Finished difference Result 57019 states and 128491 transitions. [2021-08-21 12:05:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:05:40,632 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:05:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:40,751 INFO L225 Difference]: With dead ends: 57019 [2021-08-21 12:05:40,751 INFO L226 Difference]: Without dead ends: 56955 [2021-08-21 12:05:40,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:05:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56955 states. [2021-08-21 12:05:41,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56955 to 55709. [2021-08-21 12:05:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55709 states, 55708 states have (on average 2.2564981690241974) internal successors, (125705), 55708 states have internal predecessors, (125705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55709 states to 55709 states and 125705 transitions. [2021-08-21 12:05:41,686 INFO L78 Accepts]: Start accepts. Automaton has 55709 states and 125705 transitions. Word has length 42 [2021-08-21 12:05:41,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:41,687 INFO L470 AbstractCegarLoop]: Abstraction has 55709 states and 125705 transitions. [2021-08-21 12:05:41,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:05:41,687 INFO L276 IsEmpty]: Start isEmpty. Operand 55709 states and 125705 transitions. [2021-08-21 12:05:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:05:41,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:41,734 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:41,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:41,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 12:05:41,935 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash -279298359, now seen corresponding path program 135 times [2021-08-21 12:05:41,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:41,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600494318] [2021-08-21 12:05:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:41,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:42,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:42,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600494318] [2021-08-21 12:05:42,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600494318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:42,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586607429] [2021-08-21 12:05:42,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:42,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:42,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:42,104 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:42,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 12:05:46,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:05:46,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:46,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:05:46,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:46,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586607429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:46,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:46,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 12:05:46,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822589316] [2021-08-21 12:05:46,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 12:05:46,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:46,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 12:05:46,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:05:46,603 INFO L87 Difference]: Start difference. First operand 55709 states and 125705 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 12:05:47,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:47,432 INFO L93 Difference]: Finished difference Result 59486 states and 133971 transitions. [2021-08-21 12:05:47,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:05:47,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) Word has length 42 [2021-08-21 12:05:47,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:47,546 INFO L225 Difference]: With dead ends: 59486 [2021-08-21 12:05:47,546 INFO L226 Difference]: Without dead ends: 59421 [2021-08-21 12:05:47,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 489.3ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:05:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59421 states. [2021-08-21 12:05:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59421 to 55326. [2021-08-21 12:05:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-08-21 12:05:48,465 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-08-21 12:05:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:48,465 INFO L470 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-08-21 12:05:48,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 12:05:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-08-21 12:05:48,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:05:48,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:48,505 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:48,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-21 12:05:48,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 12:05:48,713 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:48,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2128565039, now seen corresponding path program 136 times [2021-08-21 12:05:48,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:48,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101621450] [2021-08-21 12:05:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:48,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:49,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:49,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101621450] [2021-08-21 12:05:49,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101621450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:49,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684513911] [2021-08-21 12:05:49,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:49,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:49,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:49,097 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:49,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 12:05:53,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:53,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:53,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:05:53,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:05:53,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684513911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:53,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:53,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-21 12:05:53,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566688081] [2021-08-21 12:05:53,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:05:53,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:53,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:05:53,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:05:53,523 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:54,105 INFO L93 Difference]: Finished difference Result 56537 states and 127438 transitions. [2021-08-21 12:05:54,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:05:54,105 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:05:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:54,217 INFO L225 Difference]: With dead ends: 56537 [2021-08-21 12:05:54,217 INFO L226 Difference]: Without dead ends: 56480 [2021-08-21 12:05:54,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:05:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56480 states. [2021-08-21 12:05:55,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56480 to 55326. [2021-08-21 12:05:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-08-21 12:05:55,160 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-08-21 12:05:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:55,161 INFO L470 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-08-21 12:05:55,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:55,161 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-08-21 12:05:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:05:55,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:55,200 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:55,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:55,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 12:05:55,400 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:55,400 INFO L82 PathProgramCache]: Analyzing trace with hash 334220379, now seen corresponding path program 137 times [2021-08-21 12:05:55,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:55,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386199643] [2021-08-21 12:05:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:55,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:55,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:55,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386199643] [2021-08-21 12:05:55,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386199643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:55,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096788964] [2021-08-21 12:05:55,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:55,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:55,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:55,575 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:55,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 12:05:59,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:05:59,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:59,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:05:59,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:06:00,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096788964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:00,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:00,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-21 12:06:00,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791136449] [2021-08-21 12:06:00,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:06:00,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:00,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:06:00,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:06:00,122 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:06:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:00,703 INFO L93 Difference]: Finished difference Result 56317 states and 126979 transitions. [2021-08-21 12:06:00,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:06:00,704 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:06:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:00,808 INFO L225 Difference]: With dead ends: 56317 [2021-08-21 12:06:00,808 INFO L226 Difference]: Without dead ends: 56270 [2021-08-21 12:06:00,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 423.9ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:06:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56270 states. [2021-08-21 12:06:01,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56270 to 55585. [2021-08-21 12:06:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55585 states, 55584 states have (on average 2.257304260218768) internal successors, (125470), 55584 states have internal predecessors, (125470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55585 states to 55585 states and 125470 transitions. [2021-08-21 12:06:01,815 INFO L78 Accepts]: Start accepts. Automaton has 55585 states and 125470 transitions. Word has length 42 [2021-08-21 12:06:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:01,815 INFO L470 AbstractCegarLoop]: Abstraction has 55585 states and 125470 transitions. [2021-08-21 12:06:01,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 12:06:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 55585 states and 125470 transitions. [2021-08-21 12:06:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:06:01,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:01,852 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:01,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-21 12:06:02,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:02,053 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:02,053 INFO L82 PathProgramCache]: Analyzing trace with hash 933252267, now seen corresponding path program 138 times [2021-08-21 12:06:02,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:02,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989702776] [2021-08-21 12:06:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:02,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:02,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:02,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989702776] [2021-08-21 12:06:02,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989702776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:02,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979437198] [2021-08-21 12:06:02,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:02,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:02,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:02,236 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:02,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 12:06:06,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:06:06,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:06,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:06:06,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:06,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979437198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:06,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:06,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-21 12:06:06,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928107563] [2021-08-21 12:06:06,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 12:06:06,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:06,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 12:06:06,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:06:06,783 INFO L87 Difference]: Start difference. First operand 55585 states and 125470 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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 12:06:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:07,901 INFO L93 Difference]: Finished difference Result 61301 states and 138297 transitions. [2021-08-21 12:06:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:06:07,902 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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) Word has length 42 [2021-08-21 12:06:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:08,014 INFO L225 Difference]: With dead ends: 61301 [2021-08-21 12:06:08,014 INFO L226 Difference]: Without dead ends: 61234 [2021-08-21 12:06:08,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 612.5ms TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:06:08,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61234 states. [2021-08-21 12:06:08,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61234 to 55915. [2021-08-21 12:06:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55915 states, 55914 states have (on average 2.256268555281325) internal successors, (126157), 55914 states have internal predecessors, (126157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55915 states to 55915 states and 126157 transitions. [2021-08-21 12:06:08,963 INFO L78 Accepts]: Start accepts. Automaton has 55915 states and 126157 transitions. Word has length 42 [2021-08-21 12:06:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:08,963 INFO L470 AbstractCegarLoop]: Abstraction has 55915 states and 126157 transitions. [2021-08-21 12:06:08,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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 12:06:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 55915 states and 126157 transitions. [2021-08-21 12:06:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 12:06:09,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:09,001 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:09,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-21 12:06:09,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:09,202 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:09,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:09,202 INFO L82 PathProgramCache]: Analyzing trace with hash 755935271, now seen corresponding path program 139 times [2021-08-21 12:06:09,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:09,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104921630] [2021-08-21 12:06:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:09,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:09,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:09,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104921630] [2021-08-21 12:06:09,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104921630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:09,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120389743] [2021-08-21 12:06:09,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:09,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:09,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:09,395 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:09,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 12:06:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:13,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 12:06:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:06:14,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120389743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:14,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:14,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-21 12:06:14,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143459798] [2021-08-21 12:06:14,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:06:14,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:06:14,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:06:14,056 INFO L87 Difference]: Start difference. First operand 55915 states and 126157 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:14,706 INFO L93 Difference]: Finished difference Result 56362 states and 127061 transitions. [2021-08-21 12:06:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:06:14,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 12:06:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:14,823 INFO L225 Difference]: With dead ends: 56362 [2021-08-21 12:06:14,823 INFO L226 Difference]: Without dead ends: 56322 [2021-08-21 12:06:14,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 448.1ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:06:14,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56322 states. [2021-08-21 12:06:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56322 to 56135. [2021-08-21 12:06:15,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56135 states, 56134 states have (on average 2.256546834360637) internal successors, (126669), 56134 states have internal predecessors, (126669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56135 states to 56135 states and 126669 transitions. [2021-08-21 12:06:15,897 INFO L78 Accepts]: Start accepts. Automaton has 56135 states and 126669 transitions. Word has length 42 [2021-08-21 12:06:15,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:15,897 INFO L470 AbstractCegarLoop]: Abstraction has 56135 states and 126669 transitions. [2021-08-21 12:06:15,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:15,897 INFO L276 IsEmpty]: Start isEmpty. Operand 56135 states and 126669 transitions. [2021-08-21 12:06:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 12:06:15,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:15,941 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:15,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-21 12:06:16,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-21 12:06:16,141 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:16,142 INFO L82 PathProgramCache]: Analyzing trace with hash 550757579, now seen corresponding path program 8 times [2021-08-21 12:06:16,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:16,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685514738] [2021-08-21 12:06:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:16,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:16,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:16,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685514738] [2021-08-21 12:06:16,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685514738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:16,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263972023] [2021-08-21 12:06:16,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:16,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:16,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:16,220 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:16,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 12:06:20,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:20,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:20,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:06:20,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:20,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263972023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:20,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:20,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:06:20,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459586406] [2021-08-21 12:06:20,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:06:20,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:20,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:06:20,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:06:20,573 INFO L87 Difference]: Start difference. First operand 56135 states and 126669 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:20,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:20,962 INFO L93 Difference]: Finished difference Result 59240 states and 132696 transitions. [2021-08-21 12:06:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:06:20,962 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 12:06:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:21,067 INFO L225 Difference]: With dead ends: 59240 [2021-08-21 12:06:21,068 INFO L226 Difference]: Without dead ends: 59240 [2021-08-21 12:06:21,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:06:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59240 states. [2021-08-21 12:06:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59240 to 56220. [2021-08-21 12:06:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56220 states, 56219 states have (on average 2.256176737401946) internal successors, (126840), 56219 states have internal predecessors, (126840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56220 states to 56220 states and 126840 transitions. [2021-08-21 12:06:22,110 INFO L78 Accepts]: Start accepts. Automaton has 56220 states and 126840 transitions. Word has length 43 [2021-08-21 12:06:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:22,111 INFO L470 AbstractCegarLoop]: Abstraction has 56220 states and 126840 transitions. [2021-08-21 12:06:22,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:22,111 INFO L276 IsEmpty]: Start isEmpty. Operand 56220 states and 126840 transitions. [2021-08-21 12:06:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:06:22,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:22,153 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:22,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-21 12:06:22,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:22,353 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:22,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:22,354 INFO L82 PathProgramCache]: Analyzing trace with hash -95294442, now seen corresponding path program 140 times [2021-08-21 12:06:22,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:22,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114073842] [2021-08-21 12:06:22,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:22,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:22,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:22,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114073842] [2021-08-21 12:06:22,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114073842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:22,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462132003] [2021-08-21 12:06:22,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:22,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:22,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:22,625 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:22,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 12:06:26,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:26,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:06:26,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:27,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462132003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:27,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:27,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-08-21 12:06:27,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857364073] [2021-08-21 12:06:27,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:06:27,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:27,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:06:27,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:06:27,301 INFO L87 Difference]: Start difference. First operand 56220 states and 126840 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:28,304 INFO L93 Difference]: Finished difference Result 57581 states and 129835 transitions. [2021-08-21 12:06:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:06:28,304 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 12:06:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:28,420 INFO L225 Difference]: With dead ends: 57581 [2021-08-21 12:06:28,420 INFO L226 Difference]: Without dead ends: 57564 [2021-08-21 12:06:28,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 640.6ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:06:28,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57564 states. [2021-08-21 12:06:29,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57564 to 57088. [2021-08-21 12:06:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57088 states, 57087 states have (on average 2.2573440538126017) internal successors, (128865), 57087 states have internal predecessors, (128865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57088 states to 57088 states and 128865 transitions. [2021-08-21 12:06:29,371 INFO L78 Accepts]: Start accepts. Automaton has 57088 states and 128865 transitions. Word has length 44 [2021-08-21 12:06:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:29,371 INFO L470 AbstractCegarLoop]: Abstraction has 57088 states and 128865 transitions. [2021-08-21 12:06:29,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 57088 states and 128865 transitions. [2021-08-21 12:06:29,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:06:29,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:29,418 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:29,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-08-21 12:06:29,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:29,619 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:29,619 INFO L82 PathProgramCache]: Analyzing trace with hash 481438942, now seen corresponding path program 141 times [2021-08-21 12:06:29,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:29,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104023382] [2021-08-21 12:06:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:29,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:29,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:29,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104023382] [2021-08-21 12:06:29,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104023382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:29,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998062581] [2021-08-21 12:06:29,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:29,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:29,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:29,889 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:29,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 12:06:34,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:06:34,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:34,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:06:34,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:34,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998062581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:34,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:34,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-08-21 12:06:34,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579549732] [2021-08-21 12:06:34,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:06:34,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:06:34,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:06:34,784 INFO L87 Difference]: Start difference. First operand 57088 states and 128865 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 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 12:06:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:36,604 INFO L93 Difference]: Finished difference Result 64602 states and 145282 transitions. [2021-08-21 12:06:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:06:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 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 44 [2021-08-21 12:06:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:36,730 INFO L225 Difference]: With dead ends: 64602 [2021-08-21 12:06:36,731 INFO L226 Difference]: Without dead ends: 64568 [2021-08-21 12:06:36,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 816.1ms TimeCoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:06:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64568 states. [2021-08-21 12:06:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64568 to 60075. [2021-08-21 12:06:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60075 states, 60074 states have (on average 2.265805506541932) internal successors, (136116), 60074 states have internal predecessors, (136116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60075 states to 60075 states and 136116 transitions. [2021-08-21 12:06:37,802 INFO L78 Accepts]: Start accepts. Automaton has 60075 states and 136116 transitions. Word has length 44 [2021-08-21 12:06:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:37,802 INFO L470 AbstractCegarLoop]: Abstraction has 60075 states and 136116 transitions. [2021-08-21 12:06:37,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 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 12:06:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 60075 states and 136116 transitions. [2021-08-21 12:06:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:06:37,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:37,847 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:37,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:38,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:38,048 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:38,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1228545046, now seen corresponding path program 142 times [2021-08-21 12:06:38,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:38,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846514376] [2021-08-21 12:06:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:38,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:38,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:38,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846514376] [2021-08-21 12:06:38,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846514376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:38,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140804330] [2021-08-21 12:06:38,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:38,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:38,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:38,318 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:38,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 12:06:42,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:42,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:42,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:06:42,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:43,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140804330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:43,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:43,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-08-21 12:06:43,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164895896] [2021-08-21 12:06:43,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 12:06:43,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 12:06:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:06:43,194 INFO L87 Difference]: Start difference. First operand 60075 states and 136116 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:44,360 INFO L93 Difference]: Finished difference Result 61117 states and 138361 transitions. [2021-08-21 12:06:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:06:44,360 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 12:06:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:44,486 INFO L225 Difference]: With dead ends: 61117 [2021-08-21 12:06:44,486 INFO L226 Difference]: Without dead ends: 61100 [2021-08-21 12:06:44,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 729.5ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 12:06:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61100 states. [2021-08-21 12:06:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61100 to 60610. [2021-08-21 12:06:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60610 states, 60609 states have (on average 2.26736953257767) internal successors, (137423), 60609 states have internal predecessors, (137423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60610 states to 60610 states and 137423 transitions. [2021-08-21 12:06:45,466 INFO L78 Accepts]: Start accepts. Automaton has 60610 states and 137423 transitions. Word has length 44 [2021-08-21 12:06:45,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:45,466 INFO L470 AbstractCegarLoop]: Abstraction has 60610 states and 137423 transitions. [2021-08-21 12:06:45,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 60610 states and 137423 transitions. [2021-08-21 12:06:45,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:06:45,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:45,511 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:45,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-21 12:06:45,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:45,711 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:45,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:45,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1967966242, now seen corresponding path program 143 times [2021-08-21 12:06:45,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:45,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975665070] [2021-08-21 12:06:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:45,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:46,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:46,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975665070] [2021-08-21 12:06:46,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975665070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:46,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306613886] [2021-08-21 12:06:46,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:46,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:46,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:46,367 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:46,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 12:06:50,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:06:50,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:50,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:06:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:51,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306613886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:51,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:51,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-08-21 12:06:51,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586724703] [2021-08-21 12:06:51,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 12:06:51,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 12:06:51,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:06:51,172 INFO L87 Difference]: Start difference. First operand 60610 states and 137423 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 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 12:06:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:52,555 INFO L93 Difference]: Finished difference Result 62141 states and 140673 transitions. [2021-08-21 12:06:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:06:52,555 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 12:06:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:52,670 INFO L225 Difference]: With dead ends: 62141 [2021-08-21 12:06:52,671 INFO L226 Difference]: Without dead ends: 62124 [2021-08-21 12:06:52,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 980.3ms TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:06:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62124 states. [2021-08-21 12:06:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62124 to 61220. [2021-08-21 12:06:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61220 states, 61219 states have (on average 2.269083127787125) internal successors, (138911), 61219 states have internal predecessors, (138911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61220 states to 61220 states and 138911 transitions. [2021-08-21 12:06:53,805 INFO L78 Accepts]: Start accepts. Automaton has 61220 states and 138911 transitions. Word has length 44 [2021-08-21 12:06:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:53,805 INFO L470 AbstractCegarLoop]: Abstraction has 61220 states and 138911 transitions. [2021-08-21 12:06:53,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 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 12:06:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 61220 states and 138911 transitions. [2021-08-21 12:06:53,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:06:53,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:53,845 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:53,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-21 12:06:54,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:54,046 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:54,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:54,046 INFO L82 PathProgramCache]: Analyzing trace with hash -87232234, now seen corresponding path program 144 times [2021-08-21 12:06:54,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:54,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637181395] [2021-08-21 12:06:54,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:54,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:54,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:54,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637181395] [2021-08-21 12:06:54,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637181395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:54,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34631396] [2021-08-21 12:06:54,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:54,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:54,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:54,311 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:54,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 12:06:58,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:06:58,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:58,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:06:58,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:59,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34631396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:59,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:59,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-08-21 12:06:59,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005483109] [2021-08-21 12:06:59,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 12:06:59,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:59,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 12:06:59,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:06:59,399 INFO L87 Difference]: Start difference. First operand 61220 states and 138911 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 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 12:07:01,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:01,012 INFO L93 Difference]: Finished difference Result 67577 states and 152697 transitions. [2021-08-21 12:07:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 12:07:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 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 44 [2021-08-21 12:07:01,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:01,138 INFO L225 Difference]: With dead ends: 67577 [2021-08-21 12:07:01,138 INFO L226 Difference]: Without dead ends: 67543 [2021-08-21 12:07:01,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1129.9ms TimeCoverageRelationStatistics Valid=223, Invalid=2747, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 12:07:01,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67543 states. [2021-08-21 12:07:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67543 to 63075. [2021-08-21 12:07:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63075 states, 63074 states have (on average 2.2736151187494054) internal successors, (143406), 63074 states have internal predecessors, (143406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63075 states to 63075 states and 143406 transitions. [2021-08-21 12:07:02,256 INFO L78 Accepts]: Start accepts. Automaton has 63075 states and 143406 transitions. Word has length 44 [2021-08-21 12:07:02,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:02,256 INFO L470 AbstractCegarLoop]: Abstraction has 63075 states and 143406 transitions. [2021-08-21 12:07:02,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 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 12:07:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 63075 states and 143406 transitions. [2021-08-21 12:07:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:07:02,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:02,303 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:02,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-21 12:07:02,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 12:07:02,503 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:02,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:02,503 INFO L82 PathProgramCache]: Analyzing trace with hash -127949090, now seen corresponding path program 145 times [2021-08-21 12:07:02,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:02,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737152801] [2021-08-21 12:07:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:02,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:02,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:02,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737152801] [2021-08-21 12:07:02,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737152801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:02,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212097807] [2021-08-21 12:07:02,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:02,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:02,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:02,978 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:02,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 12:07:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:07,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:07:07,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:07,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212097807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:07,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:07,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-08-21 12:07:07,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508261108] [2021-08-21 12:07:07,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:07:07,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:07,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:07:07,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:07:07,886 INFO L87 Difference]: Start difference. First operand 63075 states and 143406 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:08,814 INFO L93 Difference]: Finished difference Result 64664 states and 146868 transitions. [2021-08-21 12:07:08,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:07:08,814 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 12:07:08,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:08,937 INFO L225 Difference]: With dead ends: 64664 [2021-08-21 12:07:08,937 INFO L226 Difference]: Without dead ends: 64630 [2021-08-21 12:07:08,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:07:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64630 states. [2021-08-21 12:07:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64630 to 64028. [2021-08-21 12:07:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64028 states, 64027 states have (on average 2.2752901119840065) internal successors, (145680), 64027 states have internal predecessors, (145680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64028 states to 64028 states and 145680 transitions. [2021-08-21 12:07:10,123 INFO L78 Accepts]: Start accepts. Automaton has 64028 states and 145680 transitions. Word has length 44 [2021-08-21 12:07:10,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:10,123 INFO L470 AbstractCegarLoop]: Abstraction has 64028 states and 145680 transitions. [2021-08-21 12:07:10,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:10,124 INFO L276 IsEmpty]: Start isEmpty. Operand 64028 states and 145680 transitions. [2021-08-21 12:07:10,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:07:10,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:10,163 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:10,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-21 12:07:10,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:10,364 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:10,364 INFO L82 PathProgramCache]: Analyzing trace with hash 274531862, now seen corresponding path program 146 times [2021-08-21 12:07:10,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:10,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224740691] [2021-08-21 12:07:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:10,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:10,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:10,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224740691] [2021-08-21 12:07:10,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224740691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:10,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098311602] [2021-08-21 12:07:10,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:10,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:10,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:10,627 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:10,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 12:07:15,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:15,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:15,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:07:15,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:15,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098311602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:15,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:15,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-08-21 12:07:15,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648128885] [2021-08-21 12:07:15,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 12:07:15,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:15,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 12:07:15,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:07:15,691 INFO L87 Difference]: Start difference. First operand 64028 states and 145680 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:16,682 INFO L93 Difference]: Finished difference Result 65329 states and 148442 transitions. [2021-08-21 12:07:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:07:16,682 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 12:07:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:16,803 INFO L225 Difference]: With dead ends: 65329 [2021-08-21 12:07:16,803 INFO L226 Difference]: Without dead ends: 65295 [2021-08-21 12:07:16,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:07:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65295 states. [2021-08-21 12:07:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65295 to 64699. [2021-08-21 12:07:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64699 states, 64698 states have (on average 2.276160004946057) internal successors, (147263), 64698 states have internal predecessors, (147263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64699 states to 64699 states and 147263 transitions. [2021-08-21 12:07:17,873 INFO L78 Accepts]: Start accepts. Automaton has 64699 states and 147263 transitions. Word has length 44 [2021-08-21 12:07:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:17,873 INFO L470 AbstractCegarLoop]: Abstraction has 64699 states and 147263 transitions. [2021-08-21 12:07:17,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:17,873 INFO L276 IsEmpty]: Start isEmpty. Operand 64699 states and 147263 transitions. [2021-08-21 12:07:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:07:17,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:17,920 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:17,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-08-21 12:07:18,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 12:07:18,120 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash -405360162, now seen corresponding path program 147 times [2021-08-21 12:07:18,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:18,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825545411] [2021-08-21 12:07:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:18,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:18,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:18,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825545411] [2021-08-21 12:07:18,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825545411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:18,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36943659] [2021-08-21 12:07:18,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:18,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:18,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:18,380 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:18,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 12:07:22,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:07:22,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:22,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:07:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:23,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36943659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:23,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:23,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-08-21 12:07:23,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425759871] [2021-08-21 12:07:23,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 12:07:23,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:23,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 12:07:23,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:07:23,558 INFO L87 Difference]: Start difference. First operand 64699 states and 147263 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 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 12:07:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:25,096 INFO L93 Difference]: Finished difference Result 75604 states and 171475 transitions. [2021-08-21 12:07:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:07:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 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 44 [2021-08-21 12:07:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:25,242 INFO L225 Difference]: With dead ends: 75604 [2021-08-21 12:07:25,242 INFO L226 Difference]: Without dead ends: 75535 [2021-08-21 12:07:25,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 849.5ms TimeCoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:07:25,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75535 states. [2021-08-21 12:07:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75535 to 69950. [2021-08-21 12:07:26,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69950 states, 69949 states have (on average 2.2841355844972764) internal successors, (159773), 69949 states have internal predecessors, (159773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69950 states to 69950 states and 159773 transitions. [2021-08-21 12:07:26,703 INFO L78 Accepts]: Start accepts. Automaton has 69950 states and 159773 transitions. Word has length 44 [2021-08-21 12:07:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:26,703 INFO L470 AbstractCegarLoop]: Abstraction has 69950 states and 159773 transitions. [2021-08-21 12:07:26,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 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 12:07:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 69950 states and 159773 transitions. [2021-08-21 12:07:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:07:26,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:26,750 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:26,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-21 12:07:26,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 12:07:26,951 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:26,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:26,951 INFO L82 PathProgramCache]: Analyzing trace with hash 875548484, now seen corresponding path program 148 times [2021-08-21 12:07:26,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:26,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896759117] [2021-08-21 12:07:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:26,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:27,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:27,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896759117] [2021-08-21 12:07:27,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896759117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:27,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310160773] [2021-08-21 12:07:27,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:27,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:27,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:27,222 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:27,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process