/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/popl20-bad/threaded-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:17:30,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:17:30,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:17:30,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-01 18:17:30,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-01 18:17:30,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-01 18:17:30,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-01 18:17:30,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-01 18:17:30,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-01 18:17:30,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-01 18:17:30,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-01 18:17:30,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-01 18:17:30,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-01 18:17:30,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-01 18:17:30,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-01 18:17:30,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-01 18:17:30,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-01 18:17:30,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-01 18:17:30,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-01 18:17:30,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-01 18:17:30,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-01 18:17:30,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-01 18:17:30,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-01 18:17:30,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-01 18:17:30,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-01 18:17:30,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-01 18:17:30,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-01 18:17:30,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-01 18:17:30,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-01 18:17:30,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-01 18:17:30,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-01 18:17:30,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-01 18:17:30,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-01 18:17:30,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-01 18:17:30,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-01 18:17:30,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-01 18:17:30,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-01 18:17:30,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-01 18:17:30,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 18:17:30,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 18:17:30,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 18:17:30,504 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 [2022-03-01 18:17:30,527 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:17:30,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:17:30,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:17:30,527 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:17:30,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:17:30,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:17:30,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:17:30,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:17:30,529 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:17:30,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:17:30,529 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:17:30,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:17:30,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:17:30,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:17:30,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:17:30,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:17:30,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:17:30,530 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:17:30,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:17:30,530 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:17:30,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:17:30,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:17:30,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:17:30,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:17:30,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:17:30,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:17:30,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:17:30,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:17:30,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:17:30,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:17:30,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:17:30,532 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:17:30,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:17:30,532 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:17:30,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:17:30,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:17:30,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:17:30,762 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:17:30,763 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:17:30,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl [2022-03-01 18:17:30,765 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl' [2022-03-01 18:17:30,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:17:30,788 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:17:30,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:17:30,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:17:30,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:17:30,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:30" (1/1) ... [2022-03-01 18:17:30,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:30" (1/1) ... [2022-03-01 18:17:30,821 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:17:30,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:17:30,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:17:30,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:17:30,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:17:30,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:30" (1/1) ... [2022-03-01 18:17:30,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:30" (1/1) ... [2022-03-01 18:17:30,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:30" (1/1) ... [2022-03-01 18:17:30,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:30" (1/1) ... [2022-03-01 18:17:30,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:30" (1/1) ... [2022-03-01 18:17:30,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:30" (1/1) ... [2022-03-01 18:17:30,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:30" (1/1) ... [2022-03-01 18:17:30,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:17:30,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:17:30,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:17:30,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:17:30,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:30" (1/1) ... [2022-03-01 18:17:30,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:17:30,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:30,871 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) [2022-03-01 18:17:30,875 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 [2022-03-01 18:17:30,908 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:17:30,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:17:30,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:17:30,909 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:17:30,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:17:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:17:30,909 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:17:30,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:17:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:17:30,909 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:17:30,961 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:17:30,962 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:17:31,038 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:17:31,072 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:17:31,072 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:17:31,073 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:17:31 BoogieIcfgContainer [2022-03-01 18:17:31,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:17:31,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:17:31,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:17:31,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:17:31,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:30" (1/2) ... [2022-03-01 18:17:31,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f413dee and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:17:31, skipping insertion in model container [2022-03-01 18:17:31,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:17:31" (2/2) ... [2022-03-01 18:17:31,095 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2022-03-01 18:17:31,098 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:17:31,098 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:17:31,099 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:17:31,099 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:17:31,131 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-01 18:17:31,168 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:17:31,173 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 18:17:31,173 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-01 18:17:31,179 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2022-03-01 18:17:31,204 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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) [2022-03-01 18:17:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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) [2022-03-01 18:17:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 18:17:31,210 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:31,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:31,211 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:31,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:31,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1895407217, now seen corresponding path program 1 times [2022-03-01 18:17:31,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:31,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876721921] [2022-03-01 18:17:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:31,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:31,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:31,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876721921] [2022-03-01 18:17:31,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876721921] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:31,355 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:31,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:17:31,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248180570] [2022-03-01 18:17:31,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:31,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:17:31,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:31,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:17:31,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:17:31,407 INFO L87 Difference]: Start difference. First operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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) Second operand has 3 states, 3 states have (on average 5.0) 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) [2022-03-01 18:17:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:31,460 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2022-03-01 18:17:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:17:31,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) 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 [2022-03-01 18:17:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:31,477 INFO L225 Difference]: With dead ends: 38 [2022-03-01 18:17:31,477 INFO L226 Difference]: Without dead ends: 38 [2022-03-01 18:17:31,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:17:31,481 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:31,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:17:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-01 18:17:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-01 18:17:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 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) [2022-03-01 18:17:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2022-03-01 18:17:31,531 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2022-03-01 18:17:31,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:31,531 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2022-03-01 18:17:31,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) 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) [2022-03-01 18:17:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2022-03-01 18:17:31,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:17:31,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:31,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:31,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:17:31,534 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:31,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:31,538 INFO L85 PathProgramCache]: Analyzing trace with hash 161461187, now seen corresponding path program 1 times [2022-03-01 18:17:31,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:31,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567130436] [2022-03-01 18:17:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:31,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:31,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:31,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567130436] [2022-03-01 18:17:31,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567130436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:31,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:31,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:17:31,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011423358] [2022-03-01 18:17:31,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:31,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:17:31,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:17:31,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:17:31,590 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:31,631 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2022-03-01 18:17:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:17:31,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:17:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:31,634 INFO L225 Difference]: With dead ends: 62 [2022-03-01 18:17:31,634 INFO L226 Difference]: Without dead ends: 62 [2022-03-01 18:17:31,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:17:31,636 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:31,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:17:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-01 18:17:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-03-01 18:17:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:31,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2022-03-01 18:17:31,644 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2022-03-01 18:17:31,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:31,644 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2022-03-01 18:17:31,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2022-03-01 18:17:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:17:31,645 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:31,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:31,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 18:17:31,646 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:31,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:31,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1536775877, now seen corresponding path program 1 times [2022-03-01 18:17:31,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:31,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409342597] [2022-03-01 18:17:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:31,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:17:31,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:31,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409342597] [2022-03-01 18:17:31,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409342597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:31,713 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:31,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:17:31,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338743819] [2022-03-01 18:17:31,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:31,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:17:31,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:31,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:17:31,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:17:31,715 INFO L87 Difference]: Start difference. First operand 60 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:31,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:31,752 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2022-03-01 18:17:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:17:31,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 18:17:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:31,753 INFO L225 Difference]: With dead ends: 87 [2022-03-01 18:17:31,753 INFO L226 Difference]: Without dead ends: 87 [2022-03-01 18:17:31,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:17:31,755 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:31,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:17:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-01 18:17:31,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2022-03-01 18:17:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2022-03-01 18:17:31,762 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2022-03-01 18:17:31,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:31,763 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2022-03-01 18:17:31,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2022-03-01 18:17:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:31,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:31,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:31,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 18:17:31,764 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:31,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1011707577, now seen corresponding path program 2 times [2022-03-01 18:17:31,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:31,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770383783] [2022-03-01 18:17:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:31,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:17:32,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:32,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770383783] [2022-03-01 18:17:32,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770383783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:32,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213912522] [2022-03-01 18:17:32,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:17:32,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:32,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:32,085 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) [2022-03-01 18:17:32,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:17:32,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:32,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:32,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:17:32,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:32,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:33,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213912522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:33,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:33,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-03-01 18:17:33,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62962185] [2022-03-01 18:17:33,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:33,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:17:33,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:17:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:17:33,375 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:34,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:34,273 INFO L93 Difference]: Finished difference Result 216 states and 395 transitions. [2022-03-01 18:17:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:17:34,273 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:17:34,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:34,275 INFO L225 Difference]: With dead ends: 216 [2022-03-01 18:17:34,275 INFO L226 Difference]: Without dead ends: 167 [2022-03-01 18:17:34,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=453, Invalid=1899, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:17:34,277 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 249 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:34,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 164 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:17:34,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-01 18:17:34,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 82. [2022-03-01 18:17:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.962962962962963) internal successors, (159), 81 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 159 transitions. [2022-03-01 18:17:34,288 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 159 transitions. Word has length 22 [2022-03-01 18:17:34,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:34,288 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 159 transitions. [2022-03-01 18:17:34,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:34,288 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 159 transitions. [2022-03-01 18:17:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:34,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:34,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:34,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:34,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:34,513 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:34,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:34,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1602763079, now seen corresponding path program 3 times [2022-03-01 18:17:34,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:34,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909770259] [2022-03-01 18:17:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:34,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:34,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:34,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909770259] [2022-03-01 18:17:34,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909770259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:34,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005512580] [2022-03-01 18:17:34,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:17:34,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:34,713 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) [2022-03-01 18:17:34,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:17:34,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:17:34,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:34,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:17:34,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:35,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:35,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005512580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:35,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:35,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-01 18:17:35,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013492863] [2022-03-01 18:17:35,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:35,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:17:35,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:35,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:17:35,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:17:35,841 INFO L87 Difference]: Start difference. First operand 82 states and 159 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:36,927 INFO L93 Difference]: Finished difference Result 230 states and 427 transitions. [2022-03-01 18:17:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:17:36,927 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:17:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:36,929 INFO L225 Difference]: With dead ends: 230 [2022-03-01 18:17:36,929 INFO L226 Difference]: Without dead ends: 216 [2022-03-01 18:17:36,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=599, Invalid=2371, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:17:36,931 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 257 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:36,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 152 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:17:36,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-01 18:17:36,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 99. [2022-03-01 18:17:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 200 transitions. [2022-03-01 18:17:36,941 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 200 transitions. Word has length 22 [2022-03-01 18:17:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:36,941 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 200 transitions. [2022-03-01 18:17:36,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 200 transitions. [2022-03-01 18:17:36,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:36,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:36,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:36,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:37,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:37,156 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:37,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:37,156 INFO L85 PathProgramCache]: Analyzing trace with hash -995630777, now seen corresponding path program 4 times [2022-03-01 18:17:37,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:37,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430282014] [2022-03-01 18:17:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:37,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:37,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:37,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430282014] [2022-03-01 18:17:37,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430282014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:37,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303636812] [2022-03-01 18:17:37,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:17:37,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:37,319 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) [2022-03-01 18:17:37,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:17:37,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:17:37,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:17:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:37,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:38,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303636812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:38,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:38,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 32 [2022-03-01 18:17:38,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493406160] [2022-03-01 18:17:38,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:38,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:17:38,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:38,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:17:38,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:17:38,128 INFO L87 Difference]: Start difference. First operand 99 states and 200 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:39,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:39,312 INFO L93 Difference]: Finished difference Result 273 states and 531 transitions. [2022-03-01 18:17:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:17:39,313 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:17:39,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:39,314 INFO L225 Difference]: With dead ends: 273 [2022-03-01 18:17:39,314 INFO L226 Difference]: Without dead ends: 244 [2022-03-01 18:17:39,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=740, Invalid=2920, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:17:39,316 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 245 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:39,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 134 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:17:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-01 18:17:39,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 99. [2022-03-01 18:17:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 200 transitions. [2022-03-01 18:17:39,325 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 200 transitions. Word has length 22 [2022-03-01 18:17:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:39,325 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 200 transitions. [2022-03-01 18:17:39,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 200 transitions. [2022-03-01 18:17:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:39,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:39,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:39,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:39,543 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 [2022-03-01 18:17:39,543 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash 2016379011, now seen corresponding path program 5 times [2022-03-01 18:17:39,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:39,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813768982] [2022-03-01 18:17:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:39,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:39,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:39,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813768982] [2022-03-01 18:17:39,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813768982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:39,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049879066] [2022-03-01 18:17:39,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:17:39,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:39,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:39,691 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) [2022-03-01 18:17:39,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:17:39,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:39,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:39,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:17:39,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:40,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:40,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049879066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:40,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:40,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-01 18:17:40,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045596289] [2022-03-01 18:17:40,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:40,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:17:40,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:17:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:17:40,574 INFO L87 Difference]: Start difference. First operand 99 states and 200 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 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) [2022-03-01 18:17:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:42,032 INFO L93 Difference]: Finished difference Result 251 states and 474 transitions. [2022-03-01 18:17:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:17:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 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 22 [2022-03-01 18:17:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:42,034 INFO L225 Difference]: With dead ends: 251 [2022-03-01 18:17:42,034 INFO L226 Difference]: Without dead ends: 237 [2022-03-01 18:17:42,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=771, Invalid=3389, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 18:17:42,035 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 270 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:42,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 178 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:17:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-01 18:17:42,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 127. [2022-03-01 18:17:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0952380952380953) internal successors, (264), 126 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 264 transitions. [2022-03-01 18:17:42,040 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 264 transitions. Word has length 22 [2022-03-01 18:17:42,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:42,040 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 264 transitions. [2022-03-01 18:17:42,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 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) [2022-03-01 18:17:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 264 transitions. [2022-03-01 18:17:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:42,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:42,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:42,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:42,260 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 [2022-03-01 18:17:42,260 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:42,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:42,261 INFO L85 PathProgramCache]: Analyzing trace with hash -582014845, now seen corresponding path program 6 times [2022-03-01 18:17:42,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:42,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527261480] [2022-03-01 18:17:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:42,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:42,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:42,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527261480] [2022-03-01 18:17:42,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527261480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:42,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969593257] [2022-03-01 18:17:42,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:17:42,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:42,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:42,400 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) [2022-03-01 18:17:42,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:17:42,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:17:42,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:42,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:17:42,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:42,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:43,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969593257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:43,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:43,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 33 [2022-03-01 18:17:43,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452197052] [2022-03-01 18:17:43,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:43,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:17:43,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:43,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:17:43,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:17:43,236 INFO L87 Difference]: Start difference. First operand 127 states and 264 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:44,416 INFO L93 Difference]: Finished difference Result 329 states and 643 transitions. [2022-03-01 18:17:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:17:44,416 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:17:44,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:44,417 INFO L225 Difference]: With dead ends: 329 [2022-03-01 18:17:44,417 INFO L226 Difference]: Without dead ends: 265 [2022-03-01 18:17:44,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=843, Invalid=3713, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 18:17:44,419 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 291 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:44,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 134 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:17:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-01 18:17:44,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 128. [2022-03-01 18:17:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.094488188976378) internal successors, (266), 127 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 266 transitions. [2022-03-01 18:17:44,429 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 266 transitions. Word has length 22 [2022-03-01 18:17:44,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:44,429 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 266 transitions. [2022-03-01 18:17:44,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 266 transitions. [2022-03-01 18:17:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:44,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:44,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:44,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:44,650 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 [2022-03-01 18:17:44,651 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:44,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1739125057, now seen corresponding path program 7 times [2022-03-01 18:17:44,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:44,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046609018] [2022-03-01 18:17:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:44,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:44,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:44,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046609018] [2022-03-01 18:17:44,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046609018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:44,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753673992] [2022-03-01 18:17:44,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:17:44,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:44,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:44,810 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) [2022-03-01 18:17:44,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:17:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:44,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 18:17:44,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:45,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:45,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753673992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:45,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:45,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-03-01 18:17:45,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784162878] [2022-03-01 18:17:45,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:45,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:17:45,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:45,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:17:45,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:17:45,716 INFO L87 Difference]: Start difference. First operand 128 states and 266 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:46,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:46,304 INFO L93 Difference]: Finished difference Result 234 states and 474 transitions. [2022-03-01 18:17:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:17:46,304 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-01 18:17:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:46,305 INFO L225 Difference]: With dead ends: 234 [2022-03-01 18:17:46,305 INFO L226 Difference]: Without dead ends: 205 [2022-03-01 18:17:46,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1631, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:17:46,306 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 166 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:46,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 89 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:17:46,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-01 18:17:46,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 128. [2022-03-01 18:17:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.094488188976378) internal successors, (266), 127 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:46,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 266 transitions. [2022-03-01 18:17:46,310 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 266 transitions. Word has length 22 [2022-03-01 18:17:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:46,311 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 266 transitions. [2022-03-01 18:17:46,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:46,311 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 266 transitions. [2022-03-01 18:17:46,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:17:46,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:46,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:46,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:46,527 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 [2022-03-01 18:17:46,528 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1223751555, now seen corresponding path program 8 times [2022-03-01 18:17:46,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:46,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490907920] [2022-03-01 18:17:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:46,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:46,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:46,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490907920] [2022-03-01 18:17:46,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490907920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:46,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764592304] [2022-03-01 18:17:46,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:17:46,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:46,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:46,692 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) [2022-03-01 18:17:46,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:17:46,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:46,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:46,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 18:17:46,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:47,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:47,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764592304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:47,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:47,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-01 18:17:47,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718674360] [2022-03-01 18:17:47,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:47,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:17:47,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:47,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:17:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:17:47,577 INFO L87 Difference]: Start difference. First operand 128 states and 266 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 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) [2022-03-01 18:17:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:48,565 INFO L93 Difference]: Finished difference Result 294 states and 585 transitions. [2022-03-01 18:17:48,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:17:48,565 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 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 22 [2022-03-01 18:17:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:48,566 INFO L225 Difference]: With dead ends: 294 [2022-03-01 18:17:48,567 INFO L226 Difference]: Without dead ends: 236 [2022-03-01 18:17:48,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=570, Invalid=2082, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:17:48,568 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 197 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:48,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 122 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:17:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-01 18:17:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 144. [2022-03-01 18:17:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.0839160839160837) internal successors, (298), 143 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 298 transitions. [2022-03-01 18:17:48,571 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 298 transitions. Word has length 22 [2022-03-01 18:17:48,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:48,571 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 298 transitions. [2022-03-01 18:17:48,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 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) [2022-03-01 18:17:48,571 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 298 transitions. [2022-03-01 18:17:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:48,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:48,572 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:48,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:48,777 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 [2022-03-01 18:17:48,778 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:48,778 INFO L85 PathProgramCache]: Analyzing trace with hash -276952247, now seen corresponding path program 9 times [2022-03-01 18:17:48,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:48,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585308907] [2022-03-01 18:17:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:48,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 18:17:48,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:48,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585308907] [2022-03-01 18:17:48,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585308907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:48,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554908947] [2022-03-01 18:17:48,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:17:48,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:48,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:48,978 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) [2022-03-01 18:17:48,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:17:49,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:17:49,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:49,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:17:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:49,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:50,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554908947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:50,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:50,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-03-01 18:17:50,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727473651] [2022-03-01 18:17:50,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:50,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:17:50,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:50,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:17:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:17:50,156 INFO L87 Difference]: Start difference. First operand 144 states and 298 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 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) [2022-03-01 18:17:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:51,224 INFO L93 Difference]: Finished difference Result 270 states and 507 transitions. [2022-03-01 18:17:51,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:17:51,224 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 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 24 [2022-03-01 18:17:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:51,225 INFO L225 Difference]: With dead ends: 270 [2022-03-01 18:17:51,225 INFO L226 Difference]: Without dead ends: 220 [2022-03-01 18:17:51,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=584, Invalid=2722, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:17:51,226 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 271 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:51,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 234 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:17:51,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-01 18:17:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 163. [2022-03-01 18:17:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.037037037037037) internal successors, (330), 162 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 330 transitions. [2022-03-01 18:17:51,230 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 330 transitions. Word has length 24 [2022-03-01 18:17:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:51,231 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 330 transitions. [2022-03-01 18:17:51,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 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) [2022-03-01 18:17:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 330 transitions. [2022-03-01 18:17:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:51,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:51,231 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:51,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:51,446 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 [2022-03-01 18:17:51,447 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:51,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1905230277, now seen corresponding path program 10 times [2022-03-01 18:17:51,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:51,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155286634] [2022-03-01 18:17:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:51,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:17:51,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:51,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155286634] [2022-03-01 18:17:51,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155286634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:51,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293468465] [2022-03-01 18:17:51,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:17:51,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:51,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:51,601 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) [2022-03-01 18:17:51,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:17:51,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:17:51,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:51,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:17:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:52,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:52,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293468465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:52,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:52,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-03-01 18:17:52,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016274678] [2022-03-01 18:17:52,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:52,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:17:52,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:52,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:17:52,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:17:52,566 INFO L87 Difference]: Start difference. First operand 163 states and 330 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 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) [2022-03-01 18:17:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:53,510 INFO L93 Difference]: Finished difference Result 270 states and 508 transitions. [2022-03-01 18:17:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:17:53,511 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 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 24 [2022-03-01 18:17:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:53,522 INFO L225 Difference]: With dead ends: 270 [2022-03-01 18:17:53,522 INFO L226 Difference]: Without dead ends: 245 [2022-03-01 18:17:53,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=797, Invalid=3493, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 18:17:53,523 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 221 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:53,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 164 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-01 18:17:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2022-03-01 18:17:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.03680981595092) internal successors, (332), 163 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 332 transitions. [2022-03-01 18:17:53,539 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 332 transitions. Word has length 24 [2022-03-01 18:17:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:53,539 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 332 transitions. [2022-03-01 18:17:53,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 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) [2022-03-01 18:17:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 332 transitions. [2022-03-01 18:17:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:53,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:53,540 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:53,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-01 18:17:53,758 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 [2022-03-01 18:17:53,759 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:53,759 INFO L85 PathProgramCache]: Analyzing trace with hash 290399277, now seen corresponding path program 11 times [2022-03-01 18:17:53,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:53,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975438936] [2022-03-01 18:17:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:53,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:53,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:53,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975438936] [2022-03-01 18:17:53,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975438936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:53,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752768780] [2022-03-01 18:17:53,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:17:53,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:53,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:53,915 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) [2022-03-01 18:17:53,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:17:53,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:17:53,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:53,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:17:53,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:54,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:55,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752768780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:55,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:55,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-01 18:17:55,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937848462] [2022-03-01 18:17:55,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:55,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:17:55,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:55,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:17:55,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:17:55,207 INFO L87 Difference]: Start difference. First operand 164 states and 332 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:57,496 INFO L93 Difference]: Finished difference Result 366 states and 702 transitions. [2022-03-01 18:17:57,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:17:57,496 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:57,497 INFO L225 Difference]: With dead ends: 366 [2022-03-01 18:17:57,497 INFO L226 Difference]: Without dead ends: 288 [2022-03-01 18:17:57,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=744, Invalid=4086, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 18:17:57,498 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 283 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:57,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 195 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:17:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-01 18:17:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 192. [2022-03-01 18:17:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0418848167539267) internal successors, (390), 191 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 390 transitions. [2022-03-01 18:17:57,502 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 390 transitions. Word has length 24 [2022-03-01 18:17:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:57,503 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 390 transitions. [2022-03-01 18:17:57,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 390 transitions. [2022-03-01 18:17:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:57,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:57,503 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:57,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:57,715 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 [2022-03-01 18:17:57,715 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:17:57,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:57,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2130799989, now seen corresponding path program 12 times [2022-03-01 18:17:57,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:57,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582969217] [2022-03-01 18:17:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:57,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:57,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:57,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582969217] [2022-03-01 18:17:57,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582969217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:57,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273860957] [2022-03-01 18:17:57,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:17:57,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:57,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:57,878 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) [2022-03-01 18:17:57,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:17:57,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:17:57,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:57,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:17:57,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:58,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:59,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273860957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:59,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:59,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-01 18:17:59,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689758860] [2022-03-01 18:17:59,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:59,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:17:59,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:17:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:17:59,940 INFO L87 Difference]: Start difference. First operand 192 states and 390 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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) [2022-03-01 18:18:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:00,674 INFO L93 Difference]: Finished difference Result 272 states and 544 transitions. [2022-03-01 18:18:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:18:00,674 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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 24 [2022-03-01 18:18:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:00,675 INFO L225 Difference]: With dead ends: 272 [2022-03-01 18:18:00,675 INFO L226 Difference]: Without dead ends: 246 [2022-03-01 18:18:00,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=427, Invalid=1925, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:18:00,677 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:00,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 91 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:18:00,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-01 18:18:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 165. [2022-03-01 18:18:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.048780487804878) internal successors, (336), 164 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 336 transitions. [2022-03-01 18:18:00,681 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 336 transitions. Word has length 24 [2022-03-01 18:18:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:00,681 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 336 transitions. [2022-03-01 18:18:00,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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) [2022-03-01 18:18:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 336 transitions. [2022-03-01 18:18:00,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:00,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:00,681 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:00,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:00,911 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 [2022-03-01 18:18:00,911 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:00,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:00,912 INFO L85 PathProgramCache]: Analyzing trace with hash -144321993, now seen corresponding path program 13 times [2022-03-01 18:18:00,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:00,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754335715] [2022-03-01 18:18:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:00,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:01,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:01,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754335715] [2022-03-01 18:18:01,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754335715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:01,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338208538] [2022-03-01 18:18:01,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:18:01,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:01,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:01,200 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) [2022-03-01 18:18:01,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:18:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:01,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:18:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:01,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:02,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338208538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:02,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:02,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-03-01 18:18:02,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824113913] [2022-03-01 18:18:02,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:02,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-01 18:18:02,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:02,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-01 18:18:02,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:18:02,649 INFO L87 Difference]: Start difference. First operand 165 states and 336 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 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) [2022-03-01 18:18:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:06,942 INFO L93 Difference]: Finished difference Result 651 states and 1266 transitions. [2022-03-01 18:18:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-01 18:18:06,942 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 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 27 [2022-03-01 18:18:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:06,944 INFO L225 Difference]: With dead ends: 651 [2022-03-01 18:18:06,944 INFO L226 Difference]: Without dead ends: 586 [2022-03-01 18:18:06,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5895 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2834, Invalid=12666, Unknown=0, NotChecked=0, Total=15500 [2022-03-01 18:18:06,949 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 477 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:06,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 299 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:18:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-03-01 18:18:06,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 248. [2022-03-01 18:18:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.145748987854251) internal successors, (530), 247 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 530 transitions. [2022-03-01 18:18:06,962 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 530 transitions. Word has length 27 [2022-03-01 18:18:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:06,962 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 530 transitions. [2022-03-01 18:18:06,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 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) [2022-03-01 18:18:06,962 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 530 transitions. [2022-03-01 18:18:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:06,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:06,963 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:06,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:07,179 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 [2022-03-01 18:18:07,179 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:07,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:07,179 INFO L85 PathProgramCache]: Analyzing trace with hash -193889737, now seen corresponding path program 14 times [2022-03-01 18:18:07,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:07,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468286605] [2022-03-01 18:18:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:07,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:07,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:07,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468286605] [2022-03-01 18:18:07,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468286605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:07,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517903185] [2022-03-01 18:18:07,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:07,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:07,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:07,381 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) [2022-03-01 18:18:07,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:18:07,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:07,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:07,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:18:07,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:07,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:08,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517903185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:08,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:08,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-03-01 18:18:08,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883580988] [2022-03-01 18:18:08,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:08,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:18:08,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:08,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:18:08,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:18:08,509 INFO L87 Difference]: Start difference. First operand 248 states and 530 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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) [2022-03-01 18:18:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:12,553 INFO L93 Difference]: Finished difference Result 688 states and 1359 transitions. [2022-03-01 18:18:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-01 18:18:12,553 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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 27 [2022-03-01 18:18:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:12,555 INFO L225 Difference]: With dead ends: 688 [2022-03-01 18:18:12,555 INFO L226 Difference]: Without dead ends: 623 [2022-03-01 18:18:12,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6815 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3106, Invalid=15526, Unknown=0, NotChecked=0, Total=18632 [2022-03-01 18:18:12,558 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 553 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:12,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 275 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:18:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-03-01 18:18:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 274. [2022-03-01 18:18:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1684981684981683) internal successors, (592), 273 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 592 transitions. [2022-03-01 18:18:12,564 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 592 transitions. Word has length 27 [2022-03-01 18:18:12,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:12,565 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 592 transitions. [2022-03-01 18:18:12,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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) [2022-03-01 18:18:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 592 transitions. [2022-03-01 18:18:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:12,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:12,568 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:12,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:12,783 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 [2022-03-01 18:18:12,783 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:12,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1874386377, now seen corresponding path program 15 times [2022-03-01 18:18:12,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:12,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898228395] [2022-03-01 18:18:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:12,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:12,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:12,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898228395] [2022-03-01 18:18:12,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898228395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:12,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262635845] [2022-03-01 18:18:12,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:12,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:12,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:12,983 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) [2022-03-01 18:18:12,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:18:13,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:18:13,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:13,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:18:13,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:13,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:14,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262635845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:14,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:14,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-03-01 18:18:14,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435898888] [2022-03-01 18:18:14,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:14,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:18:14,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:14,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:18:14,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:18:14,120 INFO L87 Difference]: Start difference. First operand 274 states and 592 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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) [2022-03-01 18:18:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:17,624 INFO L93 Difference]: Finished difference Result 717 states and 1446 transitions. [2022-03-01 18:18:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-01 18:18:17,625 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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 27 [2022-03-01 18:18:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:17,626 INFO L225 Difference]: With dead ends: 717 [2022-03-01 18:18:17,627 INFO L226 Difference]: Without dead ends: 659 [2022-03-01 18:18:17,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6823 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3101, Invalid=15805, Unknown=0, NotChecked=0, Total=18906 [2022-03-01 18:18:17,628 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 614 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:17,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 261 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:18:17,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-03-01 18:18:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 305. [2022-03-01 18:18:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.2072368421052633) internal successors, (671), 304 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 671 transitions. [2022-03-01 18:18:17,635 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 671 transitions. Word has length 27 [2022-03-01 18:18:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:17,635 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 671 transitions. [2022-03-01 18:18:17,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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) [2022-03-01 18:18:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 671 transitions. [2022-03-01 18:18:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:17,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:17,636 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:17,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-01 18:18:17,836 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 [2022-03-01 18:18:17,836 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:17,837 INFO L85 PathProgramCache]: Analyzing trace with hash -177812937, now seen corresponding path program 16 times [2022-03-01 18:18:17,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:17,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567639177] [2022-03-01 18:18:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:17,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:18,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:18,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567639177] [2022-03-01 18:18:18,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567639177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:18,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569325553] [2022-03-01 18:18:18,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:18,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:18,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:18,034 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) [2022-03-01 18:18:18,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:18:18,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:18,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:18,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:18:18,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:18,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:18,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569325553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:18,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:18,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 41 [2022-03-01 18:18:18,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500615669] [2022-03-01 18:18:18,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:18,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-01 18:18:18,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-01 18:18:18,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:18:18,802 INFO L87 Difference]: Start difference. First operand 305 states and 671 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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) [2022-03-01 18:18:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:23,355 INFO L93 Difference]: Finished difference Result 852 states and 1700 transitions. [2022-03-01 18:18:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-01 18:18:23,356 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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 27 [2022-03-01 18:18:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:23,358 INFO L225 Difference]: With dead ends: 852 [2022-03-01 18:18:23,358 INFO L226 Difference]: Without dead ends: 750 [2022-03-01 18:18:23,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11383 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4461, Invalid=25295, Unknown=0, NotChecked=0, Total=29756 [2022-03-01 18:18:23,360 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 708 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 2759 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:23,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 367 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2759 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:18:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-03-01 18:18:23,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 303. [2022-03-01 18:18:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.2019867549668874) internal successors, (665), 302 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:23,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 665 transitions. [2022-03-01 18:18:23,367 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 665 transitions. Word has length 27 [2022-03-01 18:18:23,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:23,367 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 665 transitions. [2022-03-01 18:18:23,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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) [2022-03-01 18:18:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 665 transitions. [2022-03-01 18:18:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:23,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:23,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:23,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:23,609 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 [2022-03-01 18:18:23,610 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:23,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1711244881, now seen corresponding path program 17 times [2022-03-01 18:18:23,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:23,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453607972] [2022-03-01 18:18:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:23,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:23,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:23,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453607972] [2022-03-01 18:18:23,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453607972] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:23,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634025234] [2022-03-01 18:18:23,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:23,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:23,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:23,762 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) [2022-03-01 18:18:23,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:18:23,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:18:23,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:23,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:18:23,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:24,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:24,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634025234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:24,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:24,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2022-03-01 18:18:24,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86249478] [2022-03-01 18:18:24,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:24,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-01 18:18:24,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:24,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-01 18:18:24,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1472, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:18:24,725 INFO L87 Difference]: Start difference. First operand 303 states and 665 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 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) [2022-03-01 18:18:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:27,883 INFO L93 Difference]: Finished difference Result 798 states and 1598 transitions. [2022-03-01 18:18:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-01 18:18:27,883 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 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 27 [2022-03-01 18:18:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:27,885 INFO L225 Difference]: With dead ends: 798 [2022-03-01 18:18:27,885 INFO L226 Difference]: Without dead ends: 682 [2022-03-01 18:18:27,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5509 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2627, Invalid=13885, Unknown=0, NotChecked=0, Total=16512 [2022-03-01 18:18:27,887 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 647 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:27,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 268 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:18:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-03-01 18:18:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 333. [2022-03-01 18:18:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.213855421686747) internal successors, (735), 332 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 735 transitions. [2022-03-01 18:18:27,895 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 735 transitions. Word has length 27 [2022-03-01 18:18:27,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:27,895 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 735 transitions. [2022-03-01 18:18:27,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 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) [2022-03-01 18:18:27,895 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 735 transitions. [2022-03-01 18:18:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:27,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:27,895 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:27,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-01 18:18:28,111 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 [2022-03-01 18:18:28,112 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:28,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1426612203, now seen corresponding path program 18 times [2022-03-01 18:18:28,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:28,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798124812] [2022-03-01 18:18:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:28,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:28,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:28,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798124812] [2022-03-01 18:18:28,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798124812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:28,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705529781] [2022-03-01 18:18:28,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:28,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:28,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:28,259 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) [2022-03-01 18:18:28,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:18:28,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:18:28,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:28,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:18:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:28,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:29,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705529781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:29,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:29,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-03-01 18:18:29,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60656867] [2022-03-01 18:18:29,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:29,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:18:29,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:29,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:18:29,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:18:29,306 INFO L87 Difference]: Start difference. First operand 333 states and 735 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:18:32,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:32,538 INFO L93 Difference]: Finished difference Result 716 states and 1447 transitions. [2022-03-01 18:18:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 18:18:32,538 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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 27 [2022-03-01 18:18:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:32,540 INFO L225 Difference]: With dead ends: 716 [2022-03-01 18:18:32,541 INFO L226 Difference]: Without dead ends: 620 [2022-03-01 18:18:32,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3779 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1995, Invalid=9135, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 18:18:32,542 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 466 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:32,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 236 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:18:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-03-01 18:18:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 333. [2022-03-01 18:18:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.213855421686747) internal successors, (735), 332 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 735 transitions. [2022-03-01 18:18:32,551 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 735 transitions. Word has length 27 [2022-03-01 18:18:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:32,551 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 735 transitions. [2022-03-01 18:18:32,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:18:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 735 transitions. [2022-03-01 18:18:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:32,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:32,552 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:32,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:32,769 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 [2022-03-01 18:18:32,770 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:32,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:32,770 INFO L85 PathProgramCache]: Analyzing trace with hash 648255859, now seen corresponding path program 19 times [2022-03-01 18:18:32,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:32,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634281330] [2022-03-01 18:18:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:32,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:32,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:32,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634281330] [2022-03-01 18:18:32,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634281330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:32,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891952533] [2022-03-01 18:18:32,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:18:32,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:32,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:32,991 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) [2022-03-01 18:18:33,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:18:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:33,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:18:33,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:33,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:34,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891952533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:34,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:34,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-03-01 18:18:34,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058517051] [2022-03-01 18:18:34,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:34,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:18:34,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:34,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:18:34,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:18:34,128 INFO L87 Difference]: Start difference. First operand 333 states and 735 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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) [2022-03-01 18:18:37,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:37,260 INFO L93 Difference]: Finished difference Result 829 states and 1722 transitions. [2022-03-01 18:18:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-01 18:18:37,260 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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 27 [2022-03-01 18:18:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:37,262 INFO L225 Difference]: With dead ends: 829 [2022-03-01 18:18:37,262 INFO L226 Difference]: Without dead ends: 764 [2022-03-01 18:18:37,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2169, Invalid=10263, Unknown=0, NotChecked=0, Total=12432 [2022-03-01 18:18:37,263 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 475 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:37,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 273 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:18:37,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-03-01 18:18:37,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 413. [2022-03-01 18:18:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.25) internal successors, (927), 412 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 927 transitions. [2022-03-01 18:18:37,270 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 927 transitions. Word has length 27 [2022-03-01 18:18:37,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:37,270 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 927 transitions. [2022-03-01 18:18:37,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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) [2022-03-01 18:18:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 927 transitions. [2022-03-01 18:18:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:37,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:37,271 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:37,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:37,471 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 [2022-03-01 18:18:37,471 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1950137997, now seen corresponding path program 20 times [2022-03-01 18:18:37,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:37,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9978686] [2022-03-01 18:18:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:37,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:37,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:37,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9978686] [2022-03-01 18:18:37,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9978686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:37,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497750242] [2022-03-01 18:18:37,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:37,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:37,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:37,662 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) [2022-03-01 18:18:37,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:18:37,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:37,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:37,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:18:37,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:38,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:38,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497750242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:38,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:38,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2022-03-01 18:18:38,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437808608] [2022-03-01 18:18:38,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:38,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-01 18:18:38,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:38,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-01 18:18:38,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:18:38,794 INFO L87 Difference]: Start difference. First operand 413 states and 927 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 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) [2022-03-01 18:18:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:42,995 INFO L93 Difference]: Finished difference Result 887 states and 1850 transitions. [2022-03-01 18:18:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-01 18:18:42,996 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 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 27 [2022-03-01 18:18:42,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:42,998 INFO L225 Difference]: With dead ends: 887 [2022-03-01 18:18:42,998 INFO L226 Difference]: Without dead ends: 771 [2022-03-01 18:18:42,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6515 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3071, Invalid=15835, Unknown=0, NotChecked=0, Total=18906 [2022-03-01 18:18:42,999 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 633 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:42,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 224 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:18:43,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-03-01 18:18:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 423. [2022-03-01 18:18:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.2369668246445498) internal successors, (944), 422 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 944 transitions. [2022-03-01 18:18:43,007 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 944 transitions. Word has length 27 [2022-03-01 18:18:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:43,007 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 944 transitions. [2022-03-01 18:18:43,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 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) [2022-03-01 18:18:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 944 transitions. [2022-03-01 18:18:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:43,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:43,008 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:43,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:43,224 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 [2022-03-01 18:18:43,225 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:43,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:43,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1187719087, now seen corresponding path program 21 times [2022-03-01 18:18:43,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:43,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223807281] [2022-03-01 18:18:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:43,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:43,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:43,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223807281] [2022-03-01 18:18:43,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223807281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:43,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875708778] [2022-03-01 18:18:43,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:43,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:43,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:43,418 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) [2022-03-01 18:18:43,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:18:43,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:18:43,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:43,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:18:43,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:43,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:44,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875708778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:44,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:44,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-03-01 18:18:44,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351510587] [2022-03-01 18:18:44,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:44,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:18:44,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:44,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:18:44,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:18:44,391 INFO L87 Difference]: Start difference. First operand 423 states and 944 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:18:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:47,114 INFO L93 Difference]: Finished difference Result 816 states and 1693 transitions. [2022-03-01 18:18:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-01 18:18:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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 27 [2022-03-01 18:18:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:47,116 INFO L225 Difference]: With dead ends: 816 [2022-03-01 18:18:47,117 INFO L226 Difference]: Without dead ends: 720 [2022-03-01 18:18:47,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2270, Invalid=9940, Unknown=0, NotChecked=0, Total=12210 [2022-03-01 18:18:47,117 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 452 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:47,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 235 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:18:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-03-01 18:18:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 377. [2022-03-01 18:18:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.223404255319149) internal successors, (836), 376 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 836 transitions. [2022-03-01 18:18:47,143 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 836 transitions. Word has length 27 [2022-03-01 18:18:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:47,144 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 836 transitions. [2022-03-01 18:18:47,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:18:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 836 transitions. [2022-03-01 18:18:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:47,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:47,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:47,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:47,373 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 [2022-03-01 18:18:47,373 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:47,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:47,374 INFO L85 PathProgramCache]: Analyzing trace with hash -144371597, now seen corresponding path program 22 times [2022-03-01 18:18:47,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:47,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226614526] [2022-03-01 18:18:47,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:47,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:47,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:47,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226614526] [2022-03-01 18:18:47,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226614526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:47,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884367121] [2022-03-01 18:18:47,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:47,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:47,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:47,562 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) [2022-03-01 18:18:47,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:18:47,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:47,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:47,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:18:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:48,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:48,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884367121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:48,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:48,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-03-01 18:18:48,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251062140] [2022-03-01 18:18:48,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:48,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:18:48,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:18:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:18:48,724 INFO L87 Difference]: Start difference. First operand 377 states and 836 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:18:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:52,880 INFO L93 Difference]: Finished difference Result 932 states and 1908 transitions. [2022-03-01 18:18:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-01 18:18:52,880 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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 27 [2022-03-01 18:18:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:52,882 INFO L225 Difference]: With dead ends: 932 [2022-03-01 18:18:52,882 INFO L226 Difference]: Without dead ends: 836 [2022-03-01 18:18:52,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5616 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3006, Invalid=13250, Unknown=0, NotChecked=0, Total=16256 [2022-03-01 18:18:52,884 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 517 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:52,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 265 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:18:52,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-03-01 18:18:52,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 422. [2022-03-01 18:18:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.2327790973871733) internal successors, (940), 421 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 940 transitions. [2022-03-01 18:18:52,891 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 940 transitions. Word has length 27 [2022-03-01 18:18:52,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:52,892 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 940 transitions. [2022-03-01 18:18:52,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:18:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 940 transitions. [2022-03-01 18:18:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:52,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:52,893 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:52,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:53,095 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 [2022-03-01 18:18:53,095 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:18:53,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:53,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1153733039, now seen corresponding path program 23 times [2022-03-01 18:18:53,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:53,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51457806] [2022-03-01 18:18:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:53,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:53,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:53,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51457806] [2022-03-01 18:18:53,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51457806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:53,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506541561] [2022-03-01 18:18:53,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:53,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:53,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:53,256 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) [2022-03-01 18:18:53,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:18:53,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:18:53,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:53,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:18:53,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:53,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:54,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506541561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:54,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:54,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-03-01 18:18:54,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893560747] [2022-03-01 18:18:54,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:54,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-01 18:18:54,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-01 18:18:54,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:18:54,588 INFO L87 Difference]: Start difference. First operand 422 states and 940 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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) [2022-03-01 18:19:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:00,032 INFO L93 Difference]: Finished difference Result 1266 states and 2595 transitions. [2022-03-01 18:19:00,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-01 18:19:00,033 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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 27 [2022-03-01 18:19:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:00,036 INFO L225 Difference]: With dead ends: 1266 [2022-03-01 18:19:00,036 INFO L226 Difference]: Without dead ends: 1245 [2022-03-01 18:19:00,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6389 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3474, Invalid=14082, Unknown=0, NotChecked=0, Total=17556 [2022-03-01 18:19:00,038 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 537 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:00,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 337 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:19:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-03-01 18:19:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 543. [2022-03-01 18:19:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.274907749077491) internal successors, (1233), 542 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1233 transitions. [2022-03-01 18:19:00,056 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1233 transitions. Word has length 27 [2022-03-01 18:19:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:00,056 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1233 transitions. [2022-03-01 18:19:00,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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) [2022-03-01 18:19:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1233 transitions. [2022-03-01 18:19:00,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:00,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:00,058 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:00,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:00,271 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 [2022-03-01 18:19:00,272 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1444660817, now seen corresponding path program 24 times [2022-03-01 18:19:00,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:00,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236030287] [2022-03-01 18:19:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:00,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:00,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:00,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236030287] [2022-03-01 18:19:00,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236030287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:00,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345279314] [2022-03-01 18:19:00,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:19:00,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:00,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:00,427 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) [2022-03-01 18:19:00,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:19:00,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:19:00,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:00,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:19:00,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:00,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:01,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345279314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:01,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:01,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-03-01 18:19:01,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143059253] [2022-03-01 18:19:01,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:01,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:19:01,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:19:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:19:01,529 INFO L87 Difference]: Start difference. First operand 543 states and 1233 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:19:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:09,279 INFO L93 Difference]: Finished difference Result 1451 states and 3008 transitions. [2022-03-01 18:19:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-03-01 18:19:09,279 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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 27 [2022-03-01 18:19:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:09,283 INFO L225 Difference]: With dead ends: 1451 [2022-03-01 18:19:09,283 INFO L226 Difference]: Without dead ends: 1380 [2022-03-01 18:19:09,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12620 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5319, Invalid=27261, Unknown=0, NotChecked=0, Total=32580 [2022-03-01 18:19:09,285 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 594 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:09,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 471 Invalid, 2681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 18:19:09,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-03-01 18:19:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 579. [2022-03-01 18:19:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.282006920415225) internal successors, (1319), 578 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1319 transitions. [2022-03-01 18:19:09,295 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1319 transitions. Word has length 27 [2022-03-01 18:19:09,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:09,295 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1319 transitions. [2022-03-01 18:19:09,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:19:09,296 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1319 transitions. [2022-03-01 18:19:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:09,296 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:09,296 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:09,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:09,513 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 [2022-03-01 18:19:09,513 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:09,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:09,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1693196267, now seen corresponding path program 25 times [2022-03-01 18:19:09,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:09,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742673303] [2022-03-01 18:19:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:09,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:09,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:09,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742673303] [2022-03-01 18:19:09,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742673303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:09,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000007989] [2022-03-01 18:19:09,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:19:09,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:09,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:09,659 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) [2022-03-01 18:19:09,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:19:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:09,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:19:09,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:10,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:10,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000007989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:10,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:10,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-03-01 18:19:10,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78109004] [2022-03-01 18:19:10,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:10,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:19:10,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:19:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:19:10,771 INFO L87 Difference]: Start difference. First operand 579 states and 1319 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 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) [2022-03-01 18:19:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:18,560 INFO L93 Difference]: Finished difference Result 1709 states and 3584 transitions. [2022-03-01 18:19:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-03-01 18:19:18,561 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 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 27 [2022-03-01 18:19:18,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:18,565 INFO L225 Difference]: With dead ends: 1709 [2022-03-01 18:19:18,565 INFO L226 Difference]: Without dead ends: 1641 [2022-03-01 18:19:18,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12214 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5391, Invalid=25409, Unknown=0, NotChecked=0, Total=30800 [2022-03-01 18:19:18,567 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 561 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:18,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 446 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2272 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 18:19:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2022-03-01 18:19:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 724. [2022-03-01 18:19:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.2835408022130013) internal successors, (1651), 723 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1651 transitions. [2022-03-01 18:19:18,597 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1651 transitions. Word has length 27 [2022-03-01 18:19:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:18,597 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 1651 transitions. [2022-03-01 18:19:18,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 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) [2022-03-01 18:19:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1651 transitions. [2022-03-01 18:19:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:18,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:18,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:18,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:18,815 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 [2022-03-01 18:19:18,815 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:18,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:18,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1820958903, now seen corresponding path program 26 times [2022-03-01 18:19:18,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:18,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652528686] [2022-03-01 18:19:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:18,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:19:18,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:18,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652528686] [2022-03-01 18:19:18,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652528686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:18,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253546972] [2022-03-01 18:19:18,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:19:18,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:18,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:18,979 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) [2022-03-01 18:19:18,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:19:19,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:19:19,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:19,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:19:19,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:19,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:20,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253546972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:20,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:20,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-03-01 18:19:20,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713569789] [2022-03-01 18:19:20,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:20,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-01 18:19:20,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:20,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-01 18:19:20,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1431, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:19:20,273 INFO L87 Difference]: Start difference. First operand 724 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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) [2022-03-01 18:19:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:23,781 INFO L93 Difference]: Finished difference Result 1358 states and 2916 transitions. [2022-03-01 18:19:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 18:19:23,781 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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 27 [2022-03-01 18:19:23,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:23,785 INFO L225 Difference]: With dead ends: 1358 [2022-03-01 18:19:23,785 INFO L226 Difference]: Without dead ends: 1293 [2022-03-01 18:19:23,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3323 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1799, Invalid=7903, Unknown=0, NotChecked=0, Total=9702 [2022-03-01 18:19:23,786 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 463 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:23,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 302 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:19:23,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-03-01 18:19:23,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 833. [2022-03-01 18:19:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.293269230769231) internal successors, (1908), 832 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1908 transitions. [2022-03-01 18:19:23,816 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1908 transitions. Word has length 27 [2022-03-01 18:19:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:23,816 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1908 transitions. [2022-03-01 18:19:23,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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) [2022-03-01 18:19:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1908 transitions. [2022-03-01 18:19:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:23,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:23,817 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:23,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:24,017 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 [2022-03-01 18:19:24,018 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:24,018 INFO L85 PathProgramCache]: Analyzing trace with hash 140462263, now seen corresponding path program 27 times [2022-03-01 18:19:24,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:24,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338040834] [2022-03-01 18:19:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:24,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:19:24,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:24,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338040834] [2022-03-01 18:19:24,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338040834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:24,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357989216] [2022-03-01 18:19:24,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:19:24,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:24,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:24,204 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) [2022-03-01 18:19:24,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:19:24,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:19:24,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:24,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:19:24,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:24,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:25,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357989216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:25,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:25,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-03-01 18:19:25,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855403939] [2022-03-01 18:19:25,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:25,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-01 18:19:25,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:25,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-01 18:19:25,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:19:25,221 INFO L87 Difference]: Start difference. First operand 833 states and 1908 transitions. Second operand has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 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) [2022-03-01 18:19:27,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:27,574 INFO L93 Difference]: Finished difference Result 1227 states and 2641 transitions. [2022-03-01 18:19:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-01 18:19:27,574 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 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 27 [2022-03-01 18:19:27,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:27,578 INFO L225 Difference]: With dead ends: 1227 [2022-03-01 18:19:27,578 INFO L226 Difference]: Without dead ends: 1213 [2022-03-01 18:19:27,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3427 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1752, Invalid=8348, Unknown=0, NotChecked=0, Total=10100 [2022-03-01 18:19:27,579 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 502 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:27,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 219 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:19:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-03-01 18:19:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 859. [2022-03-01 18:19:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.296037296037296) internal successors, (1970), 858 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1970 transitions. [2022-03-01 18:19:27,601 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1970 transitions. Word has length 27 [2022-03-01 18:19:27,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:27,601 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1970 transitions. [2022-03-01 18:19:27,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 42 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) [2022-03-01 18:19:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1970 transitions. [2022-03-01 18:19:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:27,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:27,603 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:27,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:27,819 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 [2022-03-01 18:19:27,819 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:27,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1837035703, now seen corresponding path program 28 times [2022-03-01 18:19:27,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:27,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721658220] [2022-03-01 18:19:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:27,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:19:27,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:27,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721658220] [2022-03-01 18:19:27,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721658220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:27,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235589455] [2022-03-01 18:19:27,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:19:27,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:27,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:27,977 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) [2022-03-01 18:19:27,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:19:27,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:19:27,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:27,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:19:27,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:28,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:28,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235589455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:28,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:28,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-03-01 18:19:28,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101612166] [2022-03-01 18:19:28,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:28,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:19:28,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:28,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:19:28,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:19:28,837 INFO L87 Difference]: Start difference. First operand 859 states and 1970 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:19:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:33,569 INFO L93 Difference]: Finished difference Result 1463 states and 3165 transitions. [2022-03-01 18:19:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-01 18:19:33,569 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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 27 [2022-03-01 18:19:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:33,572 INFO L225 Difference]: With dead ends: 1463 [2022-03-01 18:19:33,572 INFO L226 Difference]: Without dead ends: 1361 [2022-03-01 18:19:33,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6445 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2835, Invalid=14987, Unknown=0, NotChecked=0, Total=17822 [2022-03-01 18:19:33,574 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 686 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:33,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 297 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:19:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-03-01 18:19:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 857. [2022-03-01 18:19:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.294392523364486) internal successors, (1964), 856 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1964 transitions. [2022-03-01 18:19:33,587 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1964 transitions. Word has length 27 [2022-03-01 18:19:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:33,587 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1964 transitions. [2022-03-01 18:19:33,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:19:33,587 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1964 transitions. [2022-03-01 18:19:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:33,588 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:33,588 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:33,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:33,794 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 [2022-03-01 18:19:33,794 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:33,795 INFO L85 PathProgramCache]: Analyzing trace with hash -778012489, now seen corresponding path program 29 times [2022-03-01 18:19:33,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:33,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989590444] [2022-03-01 18:19:33,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:33,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:19:33,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:33,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989590444] [2022-03-01 18:19:33,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989590444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:33,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623783225] [2022-03-01 18:19:33,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:19:33,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:33,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:33,952 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) [2022-03-01 18:19:33,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:19:33,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:19:33,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:33,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:19:33,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:34,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:34,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623783225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:34,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:34,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-03-01 18:19:34,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224075946] [2022-03-01 18:19:34,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:34,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-01 18:19:34,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:34,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-01 18:19:34,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:19:34,853 INFO L87 Difference]: Start difference. First operand 857 states and 1964 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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) [2022-03-01 18:19:37,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:37,481 INFO L93 Difference]: Finished difference Result 1458 states and 3123 transitions. [2022-03-01 18:19:37,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-01 18:19:37,481 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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 27 [2022-03-01 18:19:37,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:37,486 INFO L225 Difference]: With dead ends: 1458 [2022-03-01 18:19:37,486 INFO L226 Difference]: Without dead ends: 1400 [2022-03-01 18:19:37,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3385 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1851, Invalid=8451, Unknown=0, NotChecked=0, Total=10302 [2022-03-01 18:19:37,487 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 366 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:37,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 262 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:19:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-03-01 18:19:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 888. [2022-03-01 18:19:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 2.2953776775648254) internal successors, (2036), 887 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:37,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2036 transitions. [2022-03-01 18:19:37,515 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2036 transitions. Word has length 27 [2022-03-01 18:19:37,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:37,515 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 2036 transitions. [2022-03-01 18:19:37,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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) [2022-03-01 18:19:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2036 transitions. [2022-03-01 18:19:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:37,517 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:37,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:37,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:37,734 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 [2022-03-01 18:19:37,734 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:37,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:37,734 INFO L85 PathProgramCache]: Analyzing trace with hash 918560951, now seen corresponding path program 30 times [2022-03-01 18:19:37,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:37,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662704910] [2022-03-01 18:19:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:37,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:19:37,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:37,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662704910] [2022-03-01 18:19:37,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662704910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:37,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237084449] [2022-03-01 18:19:37,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:19:37,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:37,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:37,881 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) [2022-03-01 18:19:37,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:19:37,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:19:37,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:19:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:38,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:39,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237084449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:39,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:39,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-03-01 18:19:39,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180795129] [2022-03-01 18:19:39,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:39,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:19:39,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:19:39,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:19:39,133 INFO L87 Difference]: Start difference. First operand 888 states and 2036 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:19:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:44,141 INFO L93 Difference]: Finished difference Result 1565 states and 3427 transitions. [2022-03-01 18:19:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-01 18:19:44,142 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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 27 [2022-03-01 18:19:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:44,147 INFO L225 Difference]: With dead ends: 1565 [2022-03-01 18:19:44,147 INFO L226 Difference]: Without dead ends: 1463 [2022-03-01 18:19:44,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5381 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2608, Invalid=13394, Unknown=0, NotChecked=0, Total=16002 [2022-03-01 18:19:44,148 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 607 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:44,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 219 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:19:44,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-03-01 18:19:44,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 915. [2022-03-01 18:19:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.2964989059080962) internal successors, (2099), 914 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2099 transitions. [2022-03-01 18:19:44,166 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2099 transitions. Word has length 27 [2022-03-01 18:19:44,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:44,166 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2099 transitions. [2022-03-01 18:19:44,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:19:44,167 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2099 transitions. [2022-03-01 18:19:44,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:44,168 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:44,168 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:44,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:44,386 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 [2022-03-01 18:19:44,387 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:44,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash -238549261, now seen corresponding path program 31 times [2022-03-01 18:19:44,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:44,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386779891] [2022-03-01 18:19:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:44,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:19:44,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:44,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386779891] [2022-03-01 18:19:44,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386779891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:44,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791407902] [2022-03-01 18:19:44,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:19:44,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:44,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:44,580 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) [2022-03-01 18:19:44,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:19:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:44,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:19:44,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:44,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:45,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791407902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:45,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:45,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-03-01 18:19:45,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131679446] [2022-03-01 18:19:45,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:45,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:19:45,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:45,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:19:45,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:19:45,552 INFO L87 Difference]: Start difference. First operand 915 states and 2099 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 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) [2022-03-01 18:19:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:49,685 INFO L93 Difference]: Finished difference Result 1839 states and 4025 transitions. [2022-03-01 18:19:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-01 18:19:49,686 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 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 27 [2022-03-01 18:19:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:49,690 INFO L225 Difference]: With dead ends: 1839 [2022-03-01 18:19:49,690 INFO L226 Difference]: Without dead ends: 1743 [2022-03-01 18:19:49,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4368 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2389, Invalid=10721, Unknown=0, NotChecked=0, Total=13110 [2022-03-01 18:19:49,691 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 458 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:49,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 253 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:19:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-03-01 18:19:49,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 932. [2022-03-01 18:19:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.297529538131042) internal successors, (2139), 931 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2139 transitions. [2022-03-01 18:19:49,717 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2139 transitions. Word has length 27 [2022-03-01 18:19:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:49,717 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 2139 transitions. [2022-03-01 18:19:49,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 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) [2022-03-01 18:19:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2139 transitions. [2022-03-01 18:19:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:49,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:49,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:49,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:49,946 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 [2022-03-01 18:19:49,947 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:49,947 INFO L85 PathProgramCache]: Analyzing trace with hash -198928785, now seen corresponding path program 32 times [2022-03-01 18:19:49,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:49,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374158707] [2022-03-01 18:19:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:49,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:50,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:50,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374158707] [2022-03-01 18:19:50,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374158707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:50,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447004242] [2022-03-01 18:19:50,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:19:50,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:50,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:50,128 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) [2022-03-01 18:19:50,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:19:50,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:19:50,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:50,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:19:50,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:50,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:51,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447004242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:51,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:51,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-03-01 18:19:51,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209916421] [2022-03-01 18:19:51,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:51,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:19:51,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:51,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:19:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:19:51,451 INFO L87 Difference]: Start difference. First operand 932 states and 2139 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:19:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:56,853 INFO L93 Difference]: Finished difference Result 1851 states and 3994 transitions. [2022-03-01 18:19:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-01 18:19:56,854 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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 27 [2022-03-01 18:19:56,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:56,857 INFO L225 Difference]: With dead ends: 1851 [2022-03-01 18:19:56,858 INFO L226 Difference]: Without dead ends: 1783 [2022-03-01 18:19:56,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6079 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2998, Invalid=14558, Unknown=0, NotChecked=0, Total=17556 [2022-03-01 18:19:56,859 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 542 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:56,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 459 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:19:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-03-01 18:19:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1050. [2022-03-01 18:19:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 2.3040991420400383) internal successors, (2417), 1049 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2417 transitions. [2022-03-01 18:19:56,877 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2417 transitions. Word has length 27 [2022-03-01 18:19:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:56,877 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 2417 transitions. [2022-03-01 18:19:56,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:19:56,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2417 transitions. [2022-03-01 18:19:56,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:56,878 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:56,878 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:56,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-01 18:19:57,095 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 [2022-03-01 18:19:57,095 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:19:57,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1880365043, now seen corresponding path program 33 times [2022-03-01 18:19:57,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:57,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967178930] [2022-03-01 18:19:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:57,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:57,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:57,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967178930] [2022-03-01 18:19:57,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967178930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:57,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399157324] [2022-03-01 18:19:57,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:19:57,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:57,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:57,273 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) [2022-03-01 18:19:57,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:19:57,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:19:57,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:57,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:19:57,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:57,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:58,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399157324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:58,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:58,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-03-01 18:19:58,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254274511] [2022-03-01 18:19:58,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:58,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:19:58,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:58,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:19:58,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:19:58,566 INFO L87 Difference]: Start difference. First operand 1050 states and 2417 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:20:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:03,085 INFO L93 Difference]: Finished difference Result 1673 states and 3668 transitions. [2022-03-01 18:20:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-01 18:20:03,085 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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 27 [2022-03-01 18:20:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:03,088 INFO L225 Difference]: With dead ends: 1673 [2022-03-01 18:20:03,088 INFO L226 Difference]: Without dead ends: 1653 [2022-03-01 18:20:03,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6663 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3318, Invalid=15864, Unknown=0, NotChecked=0, Total=19182 [2022-03-01 18:20:03,089 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 491 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:03,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 369 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:20:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-03-01 18:20:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1055. [2022-03-01 18:20:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.3026565464895636) internal successors, (2427), 1054 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2427 transitions. [2022-03-01 18:20:03,128 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2427 transitions. Word has length 27 [2022-03-01 18:20:03,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:03,129 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 2427 transitions. [2022-03-01 18:20:03,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2022-03-01 18:20:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2427 transitions. [2022-03-01 18:20:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:20:03,130 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:03,130 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:03,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:03,359 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 [2022-03-01 18:20:03,359 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:03,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:03,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1651423031, now seen corresponding path program 34 times [2022-03-01 18:20:03,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:03,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247539889] [2022-03-01 18:20:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:03,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:03,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:03,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247539889] [2022-03-01 18:20:03,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247539889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:03,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146631399] [2022-03-01 18:20:03,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:20:03,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:03,544 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) [2022-03-01 18:20:03,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:20:03,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:20:03,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:03,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 18:20:03,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:04,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:06,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146631399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:06,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:06,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 41 [2022-03-01 18:20:06,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438254017] [2022-03-01 18:20:06,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:06,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-01 18:20:06,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:06,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-01 18:20:06,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:20:06,023 INFO L87 Difference]: Start difference. First operand 1055 states and 2427 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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) [2022-03-01 18:20:10,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:10,618 INFO L93 Difference]: Finished difference Result 1976 states and 4378 transitions. [2022-03-01 18:20:10,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-01 18:20:10,619 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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 27 [2022-03-01 18:20:10,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:10,622 INFO L225 Difference]: With dead ends: 1976 [2022-03-01 18:20:10,622 INFO L226 Difference]: Without dead ends: 1956 [2022-03-01 18:20:10,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5419 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2716, Invalid=13286, Unknown=0, NotChecked=0, Total=16002 [2022-03-01 18:20:10,623 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 426 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:10,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 402 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:20:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-03-01 18:20:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1050. [2022-03-01 18:20:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 2.296472831267874) internal successors, (2409), 1049 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2409 transitions. [2022-03-01 18:20:10,640 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2409 transitions. Word has length 27 [2022-03-01 18:20:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:10,640 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 2409 transitions. [2022-03-01 18:20:10,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 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) [2022-03-01 18:20:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2409 transitions. [2022-03-01 18:20:10,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:20:10,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:10,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:10,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:10,847 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 [2022-03-01 18:20:10,847 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:10,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:10,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1716949619, now seen corresponding path program 35 times [2022-03-01 18:20:10,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:10,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500910883] [2022-03-01 18:20:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:10,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:11,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:11,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500910883] [2022-03-01 18:20:11,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500910883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:11,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687206839] [2022-03-01 18:20:11,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:20:11,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:11,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:11,016 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) [2022-03-01 18:20:11,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:20:11,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:20:11,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:11,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:20:11,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:11,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:11,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687206839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:11,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:11,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-03-01 18:20:11,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504586289] [2022-03-01 18:20:11,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:11,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-01 18:20:11,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:11,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-01 18:20:11,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:20:11,964 INFO L87 Difference]: Start difference. First operand 1050 states and 2409 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 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) [2022-03-01 18:20:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:15,077 INFO L93 Difference]: Finished difference Result 1991 states and 4278 transitions. [2022-03-01 18:20:15,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-01 18:20:15,077 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 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 27 [2022-03-01 18:20:15,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:15,080 INFO L225 Difference]: With dead ends: 1991 [2022-03-01 18:20:15,080 INFO L226 Difference]: Without dead ends: 1916 [2022-03-01 18:20:15,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4434 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2234, Invalid=10198, Unknown=0, NotChecked=0, Total=12432 [2022-03-01 18:20:15,081 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 488 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 2225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:15,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 482 Invalid, 2225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2023 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:20:15,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2022-03-01 18:20:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1300. [2022-03-01 18:20:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.311008468052348) internal successors, (3002), 1299 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3002 transitions. [2022-03-01 18:20:15,099 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3002 transitions. Word has length 27 [2022-03-01 18:20:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:15,099 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 3002 transitions. [2022-03-01 18:20:15,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 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) [2022-03-01 18:20:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3002 transitions. [2022-03-01 18:20:15,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:20:15,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:15,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:15,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:15,315 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 [2022-03-01 18:20:15,315 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:15,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:15,316 INFO L85 PathProgramCache]: Analyzing trace with hash 36452979, now seen corresponding path program 36 times [2022-03-01 18:20:15,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:15,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694786611] [2022-03-01 18:20:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:15,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:15,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:15,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694786611] [2022-03-01 18:20:15,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694786611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:15,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923126772] [2022-03-01 18:20:15,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:20:15,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:15,493 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) [2022-03-01 18:20:15,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:20:15,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:20:15,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:15,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:20:15,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:15,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:16,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923126772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:16,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:16,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-03-01 18:20:16,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131081832] [2022-03-01 18:20:16,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:16,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-01 18:20:16,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:16,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-01 18:20:16,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:20:16,398 INFO L87 Difference]: Start difference. First operand 1300 states and 3002 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 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) [2022-03-01 18:20:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:20,045 INFO L93 Difference]: Finished difference Result 2024 states and 4411 transitions. [2022-03-01 18:20:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-01 18:20:20,045 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 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 27 [2022-03-01 18:20:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:20,048 INFO L225 Difference]: With dead ends: 2024 [2022-03-01 18:20:20,049 INFO L226 Difference]: Without dead ends: 1956 [2022-03-01 18:20:20,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6231 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2873, Invalid=14683, Unknown=0, NotChecked=0, Total=17556 [2022-03-01 18:20:20,050 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 583 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:20,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 469 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:20:20,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-03-01 18:20:20,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1238. [2022-03-01 18:20:20,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.320129345189976) internal successors, (2870), 1237 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2870 transitions. [2022-03-01 18:20:20,068 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2870 transitions. Word has length 27 [2022-03-01 18:20:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:20,069 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 2870 transitions. [2022-03-01 18:20:20,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 42 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) [2022-03-01 18:20:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2870 transitions. [2022-03-01 18:20:20,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:20:20,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:20,070 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:20,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:20,287 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 [2022-03-01 18:20:20,287 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:20,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:20,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1733026419, now seen corresponding path program 37 times [2022-03-01 18:20:20,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:20,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134524825] [2022-03-01 18:20:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:20,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:20,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:20,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134524825] [2022-03-01 18:20:20,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134524825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:20,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584144670] [2022-03-01 18:20:20,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:20:20,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:20,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:20,482 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) [2022-03-01 18:20:20,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 18:20:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:20,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:20:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:21,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:21,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584144670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:21,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:21,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 40 [2022-03-01 18:20:21,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610207206] [2022-03-01 18:20:21,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:21,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 18:20:21,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:21,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 18:20:21,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:20:21,657 INFO L87 Difference]: Start difference. First operand 1238 states and 2870 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 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) [2022-03-01 18:20:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:26,344 INFO L93 Difference]: Finished difference Result 2027 states and 4488 transitions. [2022-03-01 18:20:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-01 18:20:26,344 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 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 27 [2022-03-01 18:20:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:26,347 INFO L225 Difference]: With dead ends: 2027 [2022-03-01 18:20:26,347 INFO L226 Difference]: Without dead ends: 1956 [2022-03-01 18:20:26,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7003 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3164, Invalid=16576, Unknown=0, NotChecked=0, Total=19740 [2022-03-01 18:20:26,349 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 589 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 2490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:26,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 376 Invalid, 2490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:20:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-03-01 18:20:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1210. [2022-03-01 18:20:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 2.3118279569892475) internal successors, (2795), 1209 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 2795 transitions. [2022-03-01 18:20:26,367 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 2795 transitions. Word has length 27 [2022-03-01 18:20:26,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:26,367 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 2795 transitions. [2022-03-01 18:20:26,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 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) [2022-03-01 18:20:26,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 2795 transitions. [2022-03-01 18:20:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:20:26,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:26,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:26,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:26,583 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 [2022-03-01 18:20:26,583 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:26,584 INFO L85 PathProgramCache]: Analyzing trace with hash 989532139, now seen corresponding path program 38 times [2022-03-01 18:20:26,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:26,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157023420] [2022-03-01 18:20:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:26,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:26,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:26,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157023420] [2022-03-01 18:20:26,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157023420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:26,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154693476] [2022-03-01 18:20:26,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:20:26,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:26,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:26,767 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) [2022-03-01 18:20:26,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 18:20:26,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:20:26,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:26,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:20:26,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:27,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:27,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154693476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:27,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:27,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-01 18:20:27,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719527234] [2022-03-01 18:20:27,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:27,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-01 18:20:27,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:27,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-01 18:20:27,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:20:27,791 INFO L87 Difference]: Start difference. First operand 1210 states and 2795 transitions. Second operand has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 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) [2022-03-01 18:20:30,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:30,216 INFO L93 Difference]: Finished difference Result 1819 states and 4016 transitions. [2022-03-01 18:20:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-01 18:20:30,216 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 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 27 [2022-03-01 18:20:30,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:30,220 INFO L225 Difference]: With dead ends: 1819 [2022-03-01 18:20:30,220 INFO L226 Difference]: Without dead ends: 1761 [2022-03-01 18:20:30,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1688, Invalid=6868, Unknown=0, NotChecked=0, Total=8556 [2022-03-01 18:20:30,221 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 406 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:30,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 413 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:20:30,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-03-01 18:20:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1251. [2022-03-01 18:20:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 2.3112) internal successors, (2889), 1250 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 2889 transitions. [2022-03-01 18:20:30,240 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 2889 transitions. Word has length 27 [2022-03-01 18:20:30,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:30,240 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 2889 transitions. [2022-03-01 18:20:30,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 38 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) [2022-03-01 18:20:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 2889 transitions. [2022-03-01 18:20:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:20:30,242 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:30,242 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:30,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:30,468 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 [2022-03-01 18:20:30,469 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:30,469 INFO L85 PathProgramCache]: Analyzing trace with hash -342558545, now seen corresponding path program 39 times [2022-03-01 18:20:30,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:30,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889620890] [2022-03-01 18:20:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:30,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:30,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:30,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889620890] [2022-03-01 18:20:30,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889620890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:30,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338939199] [2022-03-01 18:20:30,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:20:30,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:30,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:30,623 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) [2022-03-01 18:20:30,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 18:20:30,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:20:30,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:30,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:20:30,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:30,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:31,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338939199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:31,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:31,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-03-01 18:20:31,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647000384] [2022-03-01 18:20:31,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:31,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:20:31,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:20:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:20:31,748 INFO L87 Difference]: Start difference. First operand 1251 states and 2889 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 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) [2022-03-01 18:20:35,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:35,980 INFO L93 Difference]: Finished difference Result 2034 states and 4490 transitions. [2022-03-01 18:20:35,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-01 18:20:35,980 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 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 27 [2022-03-01 18:20:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:35,983 INFO L225 Difference]: With dead ends: 2034 [2022-03-01 18:20:35,983 INFO L226 Difference]: Without dead ends: 1966 [2022-03-01 18:20:35,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5137 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2605, Invalid=12401, Unknown=0, NotChecked=0, Total=15006 [2022-03-01 18:20:35,987 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 399 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:35,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 300 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:20:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-03-01 18:20:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1192. [2022-03-01 18:20:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 2.311502938706969) internal successors, (2753), 1191 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2753 transitions. [2022-03-01 18:20:36,008 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2753 transitions. Word has length 27 [2022-03-01 18:20:36,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:36,008 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 2753 transitions. [2022-03-01 18:20:36,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 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) [2022-03-01 18:20:36,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2753 transitions. [2022-03-01 18:20:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:20:36,010 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:36,010 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:36,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:36,215 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 [2022-03-01 18:20:36,215 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:36,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:36,216 INFO L85 PathProgramCache]: Analyzing trace with hash 56938553, now seen corresponding path program 40 times [2022-03-01 18:20:36,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:36,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068625997] [2022-03-01 18:20:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-01 18:20:36,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:36,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068625997] [2022-03-01 18:20:36,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068625997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:36,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946974937] [2022-03-01 18:20:36,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:20:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:36,377 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) [2022-03-01 18:20:36,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 18:20:36,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:20:36,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:36,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:20:36,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:36,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:37,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946974937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:37,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:37,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 16] total 43 [2022-03-01 18:20:37,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127961980] [2022-03-01 18:20:37,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:37,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:20:37,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:37,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:20:37,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:20:37,688 INFO L87 Difference]: Start difference. First operand 1192 states and 2753 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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) [2022-03-01 18:20:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:40,619 INFO L93 Difference]: Finished difference Result 2673 states and 6185 transitions. [2022-03-01 18:20:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 18:20:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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 29 [2022-03-01 18:20:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:40,622 INFO L225 Difference]: With dead ends: 2673 [2022-03-01 18:20:40,622 INFO L226 Difference]: Without dead ends: 2542 [2022-03-01 18:20:40,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1411, Invalid=7145, Unknown=0, NotChecked=0, Total=8556 [2022-03-01 18:20:40,623 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 295 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:40,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 230 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:20:40,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2022-03-01 18:20:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 595. [2022-03-01 18:20:40,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.0336700336700337) internal successors, (1208), 594 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1208 transitions. [2022-03-01 18:20:40,637 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1208 transitions. Word has length 29 [2022-03-01 18:20:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:40,638 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1208 transitions. [2022-03-01 18:20:40,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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) [2022-03-01 18:20:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1208 transitions. [2022-03-01 18:20:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:20:40,638 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:40,639 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:40,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:40,867 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 [2022-03-01 18:20:40,867 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:40,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1849159349, now seen corresponding path program 41 times [2022-03-01 18:20:40,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:40,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662967940] [2022-03-01 18:20:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:40,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 18:20:41,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:41,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662967940] [2022-03-01 18:20:41,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662967940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:41,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565210751] [2022-03-01 18:20:41,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:20:41,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:41,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:41,048 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) [2022-03-01 18:20:41,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 18:20:41,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 18:20:41,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:41,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:20:41,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:41,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:42,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565210751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:42,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:42,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 16] total 43 [2022-03-01 18:20:42,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829506282] [2022-03-01 18:20:42,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:42,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-01 18:20:42,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:42,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-01 18:20:42,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:20:42,328 INFO L87 Difference]: Start difference. First operand 595 states and 1208 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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) [2022-03-01 18:20:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:44,525 INFO L93 Difference]: Finished difference Result 908 states and 1838 transitions. [2022-03-01 18:20:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 18:20:44,525 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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 29 [2022-03-01 18:20:44,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:44,526 INFO L225 Difference]: With dead ends: 908 [2022-03-01 18:20:44,526 INFO L226 Difference]: Without dead ends: 883 [2022-03-01 18:20:44,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1393, Invalid=7537, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 18:20:44,527 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 290 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:44,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 121 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:20:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-03-01 18:20:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 589. [2022-03-01 18:20:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.0051020408163267) internal successors, (1179), 588 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1179 transitions. [2022-03-01 18:20:44,535 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1179 transitions. Word has length 29 [2022-03-01 18:20:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:44,535 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 1179 transitions. [2022-03-01 18:20:44,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 43 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) [2022-03-01 18:20:44,535 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1179 transitions. [2022-03-01 18:20:44,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:20:44,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:44,536 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:44,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:44,752 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 [2022-03-01 18:20:44,752 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:44,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:44,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1727060569, now seen corresponding path program 42 times [2022-03-01 18:20:44,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:44,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971269747] [2022-03-01 18:20:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:44,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:44,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:44,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971269747] [2022-03-01 18:20:44,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971269747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:44,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998827530] [2022-03-01 18:20:44,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:20:44,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:44,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:44,982 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) [2022-03-01 18:20:44,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 18:20:45,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 18:20:45,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:45,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:20:45,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:45,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:47,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998827530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:47,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:47,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-03-01 18:20:47,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115184826] [2022-03-01 18:20:47,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:47,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-01 18:20:47,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:47,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-01 18:20:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1502, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:20:47,012 INFO L87 Difference]: Start difference. First operand 589 states and 1179 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:52,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:52,464 INFO L93 Difference]: Finished difference Result 1179 states and 2345 transitions. [2022-03-01 18:20:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-01 18:20:52,464 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:20:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:52,465 INFO L225 Difference]: With dead ends: 1179 [2022-03-01 18:20:52,465 INFO L226 Difference]: Without dead ends: 1136 [2022-03-01 18:20:52,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3128 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1522, Invalid=8578, Unknown=0, NotChecked=0, Total=10100 [2022-03-01 18:20:52,466 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 288 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:52,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 98 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:20:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-03-01 18:20:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 759. [2022-03-01 18:20:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.0026385224274406) internal successors, (1518), 758 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1518 transitions. [2022-03-01 18:20:52,476 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1518 transitions. Word has length 29 [2022-03-01 18:20:52,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:52,476 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1518 transitions. [2022-03-01 18:20:52,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1518 transitions. [2022-03-01 18:20:52,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:20:52,477 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:52,477 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:52,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:52,693 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 [2022-03-01 18:20:52,694 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:20:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:52,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1863336609, now seen corresponding path program 43 times [2022-03-01 18:20:52,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:52,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614284046] [2022-03-01 18:20:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:52,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:52,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:52,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614284046] [2022-03-01 18:20:52,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614284046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:52,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307101954] [2022-03-01 18:20:52,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:20:52,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:52,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:52,863 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) [2022-03-01 18:20:52,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 18:20:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:52,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:20:52,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:53,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:54,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307101954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:54,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:54,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-03-01 18:20:54,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738848381] [2022-03-01 18:20:54,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:54,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-01 18:20:54,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:54,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-01 18:20:54,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:20:54,798 INFO L87 Difference]: Start difference. First operand 759 states and 1518 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:00,174 INFO L93 Difference]: Finished difference Result 1815 states and 3619 transitions. [2022-03-01 18:21:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 18:21:00,174 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:21:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:00,176 INFO L225 Difference]: With dead ends: 1815 [2022-03-01 18:21:00,176 INFO L226 Difference]: Without dead ends: 1769 [2022-03-01 18:21:00,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3913 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1903, Invalid=10307, Unknown=0, NotChecked=0, Total=12210 [2022-03-01 18:21:00,177 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 249 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:00,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 107 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:21:00,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-03-01 18:21:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1016. [2022-03-01 18:21:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.0009852216748767) internal successors, (2031), 1015 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2031 transitions. [2022-03-01 18:21:00,198 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2031 transitions. Word has length 29 [2022-03-01 18:21:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:00,199 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 2031 transitions. [2022-03-01 18:21:00,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2031 transitions. [2022-03-01 18:21:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:21:00,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:00,200 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:00,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:00,416 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 [2022-03-01 18:21:00,416 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:21:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:00,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1925315549, now seen corresponding path program 44 times [2022-03-01 18:21:00,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:00,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951987486] [2022-03-01 18:21:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:00,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:00,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:00,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951987486] [2022-03-01 18:21:00,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951987486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:00,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882943951] [2022-03-01 18:21:00,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:21:00,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:00,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:00,632 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) [2022-03-01 18:21:00,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:21:00,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:21:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:00,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 18:21:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:01,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:02,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882943951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:02,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:02,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-03-01 18:21:02,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085481984] [2022-03-01 18:21:02,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:02,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-01 18:21:02,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:02,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-01 18:21:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:21:02,280 INFO L87 Difference]: Start difference. First operand 1016 states and 2031 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:08,031 INFO L93 Difference]: Finished difference Result 2259 states and 4514 transitions. [2022-03-01 18:21:08,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-01 18:21:08,031 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:21:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:08,033 INFO L225 Difference]: With dead ends: 2259 [2022-03-01 18:21:08,033 INFO L226 Difference]: Without dead ends: 2223 [2022-03-01 18:21:08,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2498, Invalid=13252, Unknown=0, NotChecked=0, Total=15750 [2022-03-01 18:21:08,034 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 278 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:08,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 135 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1812 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:21:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2022-03-01 18:21:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1208. [2022-03-01 18:21:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.003314001657001) internal successors, (2418), 1207 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2418 transitions. [2022-03-01 18:21:08,049 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2418 transitions. Word has length 29 [2022-03-01 18:21:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:08,049 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 2418 transitions. [2022-03-01 18:21:08,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2418 transitions. [2022-03-01 18:21:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:21:08,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:08,050 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:08,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-01 18:21:08,263 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 [2022-03-01 18:21:08,263 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:21:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:08,264 INFO L85 PathProgramCache]: Analyzing trace with hash 849604393, now seen corresponding path program 45 times [2022-03-01 18:21:08,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:08,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606943828] [2022-03-01 18:21:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:08,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:08,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:08,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606943828] [2022-03-01 18:21:08,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606943828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:08,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174321880] [2022-03-01 18:21:08,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:21:08,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:08,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:08,456 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) [2022-03-01 18:21:08,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 18:21:08,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 18:21:08,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:08,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:21:08,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:09,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:10,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174321880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:10,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:10,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-03-01 18:21:10,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736178893] [2022-03-01 18:21:10,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:10,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-01 18:21:10,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:10,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-01 18:21:10,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:21:10,217 INFO L87 Difference]: Start difference. First operand 1208 states and 2418 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:14,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:14,247 INFO L93 Difference]: Finished difference Result 2363 states and 4723 transitions. [2022-03-01 18:21:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-01 18:21:14,248 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:21:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:14,250 INFO L225 Difference]: With dead ends: 2363 [2022-03-01 18:21:14,250 INFO L226 Difference]: Without dead ends: 2333 [2022-03-01 18:21:14,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4580 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2095, Invalid=11015, Unknown=0, NotChecked=0, Total=13110 [2022-03-01 18:21:14,252 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 278 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:14,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 168 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:21:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-03-01 18:21:14,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1213. [2022-03-01 18:21:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.004125412541254) internal successors, (2429), 1212 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2429 transitions. [2022-03-01 18:21:14,285 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2429 transitions. Word has length 29 [2022-03-01 18:21:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:14,285 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 2429 transitions. [2022-03-01 18:21:14,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2429 transitions. [2022-03-01 18:21:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:21:14,286 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:14,286 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:14,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:14,505 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 [2022-03-01 18:21:14,506 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:21:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2097362907, now seen corresponding path program 46 times [2022-03-01 18:21:14,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:14,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229376764] [2022-03-01 18:21:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:14,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:21:14,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:14,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229376764] [2022-03-01 18:21:14,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229376764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:14,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626183470] [2022-03-01 18:21:14,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:21:14,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:14,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:14,752 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) [2022-03-01 18:21:14,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 18:21:14,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:21:14,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:14,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:21:14,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:15,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:16,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626183470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:16,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:16,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-03-01 18:21:16,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307891336] [2022-03-01 18:21:16,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:16,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-01 18:21:16,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:16,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-01 18:21:16,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:21:16,601 INFO L87 Difference]: Start difference. First operand 1213 states and 2429 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:21,791 INFO L93 Difference]: Finished difference Result 2885 states and 5768 transitions. [2022-03-01 18:21:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-01 18:21:21,791 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:21:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:21,794 INFO L225 Difference]: With dead ends: 2885 [2022-03-01 18:21:21,794 INFO L226 Difference]: Without dead ends: 2834 [2022-03-01 18:21:21,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4093 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1895, Invalid=10315, Unknown=0, NotChecked=0, Total=12210 [2022-03-01 18:21:21,795 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 324 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:21,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 186 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 18:21:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-03-01 18:21:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1824. [2022-03-01 18:21:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 2.0098738343390017) internal successors, (3664), 1823 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3664 transitions. [2022-03-01 18:21:21,818 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3664 transitions. Word has length 29 [2022-03-01 18:21:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:21,818 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 3664 transitions. [2022-03-01 18:21:21,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3664 transitions. [2022-03-01 18:21:21,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:21:21,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:21,820 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:21,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:22,034 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 [2022-03-01 18:21:22,035 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:21:22,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:22,035 INFO L85 PathProgramCache]: Analyzing trace with hash 110491549, now seen corresponding path program 47 times [2022-03-01 18:21:22,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:22,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504489684] [2022-03-01 18:21:22,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:22,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:22,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:22,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504489684] [2022-03-01 18:21:22,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504489684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:22,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682327589] [2022-03-01 18:21:22,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:21:22,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:22,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:22,198 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) [2022-03-01 18:21:22,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 18:21:22,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:21:22,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:22,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:21:22,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:22,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:23,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682327589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:23,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:23,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-03-01 18:21:23,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697543386] [2022-03-01 18:21:23,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:23,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-01 18:21:23,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-01 18:21:23,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 18:21:23,722 INFO L87 Difference]: Start difference. First operand 1824 states and 3664 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:26,960 INFO L93 Difference]: Finished difference Result 3116 states and 6260 transitions. [2022-03-01 18:21:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:21:26,960 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:21:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:26,963 INFO L225 Difference]: With dead ends: 3116 [2022-03-01 18:21:26,963 INFO L226 Difference]: Without dead ends: 3065 [2022-03-01 18:21:26,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1379, Invalid=7933, Unknown=0, NotChecked=0, Total=9312 [2022-03-01 18:21:26,964 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 242 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:26,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 192 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:21:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-03-01 18:21:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 1021. [2022-03-01 18:21:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 1.996078431372549) internal successors, (2036), 1020 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2036 transitions. [2022-03-01 18:21:26,993 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2036 transitions. Word has length 29 [2022-03-01 18:21:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:26,993 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 2036 transitions. [2022-03-01 18:21:26,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:26,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2036 transitions. [2022-03-01 18:21:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 18:21:26,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:26,995 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:27,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:27,213 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 [2022-03-01 18:21:27,214 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:21:27,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:27,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1219843941, now seen corresponding path program 48 times [2022-03-01 18:21:27,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:27,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731534327] [2022-03-01 18:21:27,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:27,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:27,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:27,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731534327] [2022-03-01 18:21:27,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731534327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:27,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585185468] [2022-03-01 18:21:27,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:21:27,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:27,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:27,400 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) [2022-03-01 18:21:27,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 18:21:27,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:21:27,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 18:21:27,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:27,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:28,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585185468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:28,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:28,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-03-01 18:21:28,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241425066] [2022-03-01 18:21:28,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:28,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-01 18:21:28,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:28,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-01 18:21:28,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:21:28,958 INFO L87 Difference]: Start difference. First operand 1021 states and 2036 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:31,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:31,306 INFO L93 Difference]: Finished difference Result 1676 states and 3347 transitions. [2022-03-01 18:21:31,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 18:21:31,306 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 18:21:31,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:31,306 INFO L225 Difference]: With dead ends: 1676 [2022-03-01 18:21:31,306 INFO L226 Difference]: Without dead ends: 0 [2022-03-01 18:21:31,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1156, Invalid=6500, Unknown=0, NotChecked=0, Total=7656 [2022-03-01 18:21:31,307 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 254 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:31,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 118 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:21:31,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-01 18:21:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-01 18:21:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-01 18:21:31,308 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-03-01 18:21:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:31,308 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-01 18:21:31,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-01 18:21:31,308 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-01 18:21:31,310 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-01 18:21:31,310 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-01 18:21:31,311 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-01 18:21:31,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:31,519 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 [2022-03-01 18:21:31,522 INFO L732 BasicCegarLoop]: Path program histogram: [48, 1, 1] [2022-03-01 18:21:31,527 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:21:31,527 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:21:31,529 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:21:31 BasicIcfg [2022-03-01 18:21:31,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:21:31,530 INFO L158 Benchmark]: Toolchain (without parser) took 240741.61ms. Allocated memory was 219.2MB in the beginning and 380.6MB in the end (delta: 161.5MB). Free memory was 180.2MB in the beginning and 140.5MB in the end (delta: 39.7MB). Peak memory consumption was 202.1MB. Max. memory is 8.0GB. [2022-03-01 18:21:31,530 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 219.2MB. Free memory is still 181.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:21:31,530 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.93ms. Allocated memory is still 219.2MB. Free memory was 180.1MB in the beginning and 178.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:21:31,530 INFO L158 Benchmark]: Boogie Preprocessor took 18.29ms. Allocated memory is still 219.2MB. Free memory was 178.6MB in the beginning and 177.7MB in the end (delta: 908.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:21:31,531 INFO L158 Benchmark]: RCFGBuilder took 229.50ms. Allocated memory is still 219.2MB. Free memory was 177.6MB in the beginning and 168.6MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:21:31,532 INFO L158 Benchmark]: TraceAbstraction took 240454.75ms. Allocated memory was 219.2MB in the beginning and 380.6MB in the end (delta: 161.5MB). Free memory was 168.0MB in the beginning and 140.5MB in the end (delta: 27.5MB). Peak memory consumption was 190.6MB. Max. memory is 8.0GB. [2022-03-01 18:21:31,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 219.2MB. Free memory is still 181.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.93ms. Allocated memory is still 219.2MB. Free memory was 180.1MB in the beginning and 178.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.29ms. Allocated memory is still 219.2MB. Free memory was 178.6MB in the beginning and 177.7MB in the end (delta: 908.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 229.50ms. Allocated memory is still 219.2MB. Free memory was 177.6MB in the beginning and 168.6MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 240454.75ms. Allocated memory was 219.2MB in the beginning and 380.6MB in the end (delta: 161.5MB). Free memory was 168.0MB in the beginning and 140.5MB in the end (delta: 27.5MB). Peak memory consumption was 190.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 55]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 240.4s, OverallIterations: 50, TraceHistogramMax: 4, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.1s, AutomataDifference: 162.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19404 SdHoareTripleChecker+Valid, 28.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19404 mSDsluCounter, 11858 SdHoareTripleChecker+Invalid, 24.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 18380 mSDsCounter, 9590 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 66015 IncrementalHoareTripleChecker+Invalid, 75605 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9590 mSolverCounterUnsat, 757 mSDtfsCounter, 66015 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6289 GetRequests, 1218 SyntacticMatches, 118 SemanticMatches, 4953 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204131 ImplicationChecksByTransitivity, 158.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1824occurred in iteration=48, InterpolantAutomatonStates: 3968, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 50 MinimizatonAttempts, 24455 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 65.3s InterpolantComputationTime, 2533 NumberOfCodeBlocks, 2533 NumberOfCodeBlocksAsserted, 171 NumberOfCheckSat, 3629 ConstructedInterpolants, 0 QuantifiedInterpolants, 82588 SizeOfPredicates, 423 NumberOfNonLiveVariables, 2064 ConjunctsInSsa, 934 ConjunctsInUnsatCore, 144 InterpolantComputations, 3 PerfectInterpolantSequences, 47/1929 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-01 18:21:31,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...