/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.abstract-por-f0ea240 [2022-02-11 01:12:13,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 01:12:13,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 01:12:13,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-11 01:12:13,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-11 01:12:13,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-11 01:12:13,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-11 01:12:13,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-11 01:12:13,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-11 01:12:13,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-11 01:12:13,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-11 01:12:13,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-11 01:12:13,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-11 01:12:13,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-11 01:12:13,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-11 01:12:13,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-11 01:12:13,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-11 01:12:13,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-11 01:12:13,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-11 01:12:13,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-11 01:12:13,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-11 01:12:13,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-11 01:12:13,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-11 01:12:13,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-11 01:12:13,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-11 01:12:13,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-11 01:12:13,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-11 01:12:13,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-11 01:12:13,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-11 01:12:13,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-11 01:12:13,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-11 01:12:13,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-11 01:12:13,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-11 01:12:13,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-11 01:12:13,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-11 01:12:13,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-11 01:12:13,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-11 01:12:13,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-11 01:12:13,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-11 01:12:13,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-11 01:12:13,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-11 01:12:13,521 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 [2022-02-11 01:12:13,555 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 01:12:13,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 01:12:13,562 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 01:12:13,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 01:12:13,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 01:12:13,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 01:12:13,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 01:12:13,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 01:12:13,564 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 01:12:13,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 01:12:13,564 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 01:12:13,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 01:12:13,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 01:12:13,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 01:12:13,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 01:12:13,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 01:12:13,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 01:12:13,565 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 01:12:13,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 01:12:13,566 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 01:12:13,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 01:12:13,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 01:12:13,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 01:12:13,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 01:12:13,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 01:12:13,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:12:13,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 01:12:13,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 01:12:13,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 01:12:13,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 01:12:13,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 01:12:13,567 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 01:12:13,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 01:12:13,568 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 01:12:13,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 01:12:13,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 01:12:13,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 01:12:13,794 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 01:12:13,796 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 01:12:13,797 INFO L432 ainManager$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 [2022-02-11 01:12:13,797 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' [2022-02-11 01:12:13,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 01:12:13,828 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 01:12:13,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 01:12:13,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 01:12:13,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 01:12:13,840 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 11.02 01:12:13" (1/1) ... [2022-02-11 01:12:13,846 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 11.02 01:12:13" (1/1) ... [2022-02-11 01:12:13,852 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 01:12:13,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 01:12:13,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 01:12:13,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 01:12:13,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 01:12:13,862 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 11.02 01:12:13" (1/1) ... [2022-02-11 01:12:13,862 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 11.02 01:12:13" (1/1) ... [2022-02-11 01:12:13,863 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 11.02 01:12:13" (1/1) ... [2022-02-11 01:12:13,864 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 11.02 01:12:13" (1/1) ... [2022-02-11 01:12:13,866 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 11.02 01:12:13" (1/1) ... [2022-02-11 01:12:13,868 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 11.02 01:12:13" (1/1) ... [2022-02-11 01:12:13,869 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 11.02 01:12:13" (1/1) ... [2022-02-11 01:12:13,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 01:12:13,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 01:12:13,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 01:12:13,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 01:12:13,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:12:13" (1/1) ... [2022-02-11 01:12:13,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:12:13,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:13,909 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) [2022-02-11 01:12:13,916 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 [2022-02-11 01:12:13,947 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 01:12:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 01:12:13,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 01:12:13,948 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 01:12:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 01:12:13,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 01:12:13,948 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 01:12:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 01:12:13,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 01:12:13,949 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 01:12:13,986 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 01:12:13,987 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 01:12:14,073 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 01:12:14,102 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 01:12:14,102 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 01:12:14,104 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:12:14 BoogieIcfgContainer [2022-02-11 01:12:14,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 01:12:14,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 01:12:14,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 01:12:14,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 01:12:14,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:12:13" (1/2) ... [2022-02-11 01:12:14,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a8cdd8b and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 01:12:14, skipping insertion in model container [2022-02-11 01:12:14,123 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 11.02 01:12:14" (2/2) ... [2022-02-11 01:12:14,124 INFO L112 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2022-02-11 01:12:14,128 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 01:12:14,128 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 01:12:14,129 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 01:12:14,129 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 01:12:14,170 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-11 01:12:14,231 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 01:12:14,237 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, 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 [2022-02-11 01:12:14,237 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-11 01:12:14,245 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2022-02-11 01:12:14,271 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) [2022-02-11 01:12:14,272 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) [2022-02-11 01:12:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 01:12:14,277 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:14,277 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:14,278 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:14,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1895407217, now seen corresponding path program 1 times [2022-02-11 01:12:14,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:14,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872904065] [2022-02-11 01:12:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:14,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:14,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:14,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872904065] [2022-02-11 01:12:14,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872904065] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:12:14,398 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:12:14,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-11 01:12:14,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447694116] [2022-02-11 01:12:14,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:12:14,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 01:12:14,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 01:12:14,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:12:14,429 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) [2022-02-11 01:12:14,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:14,464 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2022-02-11 01:12:14,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 01:12:14,467 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 [2022-02-11 01:12:14,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:14,474 INFO L225 Difference]: With dead ends: 38 [2022-02-11 01:12:14,474 INFO L226 Difference]: Without dead ends: 38 [2022-02-11 01:12:14,475 INFO L933 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 [2022-02-11 01:12:14,478 INFO L934 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 [2022-02-11 01:12:14,479 INFO L935 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] [2022-02-11 01:12:14,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-11 01:12:14,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-11 01:12:14,525 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) [2022-02-11 01:12:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2022-02-11 01:12:14,526 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2022-02-11 01:12:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:14,527 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2022-02-11 01:12:14,527 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) [2022-02-11 01:12:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2022-02-11 01:12:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-11 01:12:14,528 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:14,528 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:14,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 01:12:14,529 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:14,530 INFO L85 PathProgramCache]: Analyzing trace with hash 161461187, now seen corresponding path program 1 times [2022-02-11 01:12:14,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:14,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037504655] [2022-02-11 01:12:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:14,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:14,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:14,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037504655] [2022-02-11 01:12:14,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037504655] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:12:14,596 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:12:14,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 01:12:14,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080834009] [2022-02-11 01:12:14,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:12:14,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:12:14,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:14,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:12:14,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:12:14,599 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) [2022-02-11 01:12:14,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:14,629 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2022-02-11 01:12:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:12:14,629 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 [2022-02-11 01:12:14,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:14,632 INFO L225 Difference]: With dead ends: 62 [2022-02-11 01:12:14,632 INFO L226 Difference]: Without dead ends: 62 [2022-02-11 01:12:14,632 INFO L933 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 [2022-02-11 01:12:14,633 INFO L934 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 [2022-02-11 01:12:14,634 INFO L935 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] [2022-02-11 01:12:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-11 01:12:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-02-11 01:12:14,642 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) [2022-02-11 01:12:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2022-02-11 01:12:14,644 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2022-02-11 01:12:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:14,644 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2022-02-11 01:12:14,644 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) [2022-02-11 01:12:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2022-02-11 01:12:14,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-11 01:12:14,645 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:14,645 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:14,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-11 01:12:14,646 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:14,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:14,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1536775877, now seen corresponding path program 1 times [2022-02-11 01:12:14,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:14,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439335485] [2022-02-11 01:12:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:14,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:14,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:14,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439335485] [2022-02-11 01:12:14,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439335485] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:12:14,691 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:12:14,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 01:12:14,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811856278] [2022-02-11 01:12:14,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:12:14,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:12:14,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:12:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-11 01:12:14,693 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) [2022-02-11 01:12:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:14,723 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2022-02-11 01:12:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:12:14,723 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 [2022-02-11 01:12:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:14,724 INFO L225 Difference]: With dead ends: 87 [2022-02-11 01:12:14,725 INFO L226 Difference]: Without dead ends: 87 [2022-02-11 01:12:14,725 INFO L933 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 [2022-02-11 01:12:14,726 INFO L934 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 [2022-02-11 01:12:14,727 INFO L935 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] [2022-02-11 01:12:14,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-11 01:12:14,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2022-02-11 01:12:14,734 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) [2022-02-11 01:12:14,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2022-02-11 01:12:14,736 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2022-02-11 01:12:14,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:14,737 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2022-02-11 01:12:14,737 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) [2022-02-11 01:12:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2022-02-11 01:12:14,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:12:14,738 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:14,738 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:14,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 01:12:14,738 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1011707577, now seen corresponding path program 2 times [2022-02-11 01:12:14,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:14,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679333400] [2022-02-11 01:12:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:12:15,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:15,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679333400] [2022-02-11 01:12:15,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679333400] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:15,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152435193] [2022-02-11 01:12:15,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:12:15,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:15,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:15,119 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) [2022-02-11 01:12:15,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 01:12:15,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:12:15,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:15,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:12:15,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:15,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:16,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152435193] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:16,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:16,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-02-11 01:12:16,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067300531] [2022-02-11 01:12:16,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:16,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 01:12:16,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:16,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 01:12:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:12:16,762 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) [2022-02-11 01:12:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:17,914 INFO L93 Difference]: Finished difference Result 216 states and 395 transitions. [2022-02-11 01:12:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 01:12:17,915 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 [2022-02-11 01:12:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:17,916 INFO L225 Difference]: With dead ends: 216 [2022-02-11 01:12:17,916 INFO L226 Difference]: Without dead ends: 167 [2022-02-11 01:12:17,918 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=453, Invalid=1899, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 01:12:17,919 INFO L934 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:17,919 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 164 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:12:17,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-11 01:12:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 82. [2022-02-11 01:12:17,933 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) [2022-02-11 01:12:17,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 159 transitions. [2022-02-11 01:12:17,934 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 159 transitions. Word has length 22 [2022-02-11 01:12:17,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:17,934 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 159 transitions. [2022-02-11 01:12:17,934 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) [2022-02-11 01:12:17,935 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 159 transitions. [2022-02-11 01:12:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:12:17,940 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:17,940 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:17,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:18,163 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 [2022-02-11 01:12:18,164 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:18,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1602763079, now seen corresponding path program 3 times [2022-02-11 01:12:18,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:18,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081639176] [2022-02-11 01:12:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:18,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:18,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:18,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081639176] [2022-02-11 01:12:18,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081639176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:18,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131425340] [2022-02-11 01:12:18,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:12:18,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:18,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:18,398 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) [2022-02-11 01:12:18,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 01:12:18,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:12:18,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:18,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:12:18,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:18,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:19,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131425340] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:19,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:19,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-02-11 01:12:19,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61988035] [2022-02-11 01:12:19,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:19,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:12:19,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:12:19,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:12:19,529 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) [2022-02-11 01:12:20,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:20,721 INFO L93 Difference]: Finished difference Result 230 states and 427 transitions. [2022-02-11 01:12:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 01:12:20,721 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 [2022-02-11 01:12:20,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:20,723 INFO L225 Difference]: With dead ends: 230 [2022-02-11 01:12:20,723 INFO L226 Difference]: Without dead ends: 216 [2022-02-11 01:12:20,724 INFO L933 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 [2022-02-11 01:12:20,725 INFO L934 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:20,725 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 152 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:12:20,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-11 01:12:20,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 99. [2022-02-11 01:12:20,735 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) [2022-02-11 01:12:20,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 200 transitions. [2022-02-11 01:12:20,736 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 200 transitions. Word has length 22 [2022-02-11 01:12:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:20,736 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 200 transitions. [2022-02-11 01:12:20,736 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) [2022-02-11 01:12:20,736 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 200 transitions. [2022-02-11 01:12:20,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:12:20,737 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:20,737 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:20,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:20,950 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 [2022-02-11 01:12:20,951 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:20,951 INFO L85 PathProgramCache]: Analyzing trace with hash -995630777, now seen corresponding path program 4 times [2022-02-11 01:12:20,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:20,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270197630] [2022-02-11 01:12:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:20,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:21,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:21,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270197630] [2022-02-11 01:12:21,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270197630] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:21,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734837325] [2022-02-11 01:12:21,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:12:21,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:21,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:21,167 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) [2022-02-11 01:12:21,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 01:12:21,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:12:21,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:12:21,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:21,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:22,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734837325] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:22,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:22,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 32 [2022-02-11 01:12:22,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041391560] [2022-02-11 01:12:22,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:22,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 01:12:22,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 01:12:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 01:12:22,096 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) [2022-02-11 01:12:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:23,341 INFO L93 Difference]: Finished difference Result 273 states and 531 transitions. [2022-02-11 01:12:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:12:23,342 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 [2022-02-11 01:12:23,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:23,343 INFO L225 Difference]: With dead ends: 273 [2022-02-11 01:12:23,344 INFO L226 Difference]: Without dead ends: 244 [2022-02-11 01:12:23,345 INFO L933 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 [2022-02-11 01:12:23,345 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 245 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-02-11 01:12:23,346 INFO L935 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] [2022-02-11 01:12:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-02-11 01:12:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 99. [2022-02-11 01:12:23,354 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) [2022-02-11 01:12:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 200 transitions. [2022-02-11 01:12:23,355 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 200 transitions. Word has length 22 [2022-02-11 01:12:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:23,355 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 200 transitions. [2022-02-11 01:12:23,355 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) [2022-02-11 01:12:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 200 transitions. [2022-02-11 01:12:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:12:23,356 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:23,356 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:23,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:23,571 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 [2022-02-11 01:12:23,572 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:23,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2016379011, now seen corresponding path program 5 times [2022-02-11 01:12:23,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:23,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428720557] [2022-02-11 01:12:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:23,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:23,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:23,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428720557] [2022-02-11 01:12:23,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428720557] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:23,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020841735] [2022-02-11 01:12:23,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:12:23,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:23,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:23,756 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) [2022-02-11 01:12:23,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 01:12:23,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:12:23,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:23,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:12:23,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:24,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:24,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020841735] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:24,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:24,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-02-11 01:12:24,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098405583] [2022-02-11 01:12:24,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:24,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:12:24,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:24,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:12:24,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:12:24,759 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) [2022-02-11 01:12:26,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:26,283 INFO L93 Difference]: Finished difference Result 251 states and 474 transitions. [2022-02-11 01:12:26,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 01:12:26,284 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 [2022-02-11 01:12:26,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:26,285 INFO L225 Difference]: With dead ends: 251 [2022-02-11 01:12:26,285 INFO L226 Difference]: Without dead ends: 237 [2022-02-11 01:12:26,286 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=771, Invalid=3389, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 01:12:26,287 INFO L934 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 [2022-02-11 01:12:26,287 INFO L935 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] [2022-02-11 01:12:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-02-11 01:12:26,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 127. [2022-02-11 01:12:26,294 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) [2022-02-11 01:12:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 264 transitions. [2022-02-11 01:12:26,295 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 264 transitions. Word has length 22 [2022-02-11 01:12:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:26,296 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 264 transitions. [2022-02-11 01:12:26,296 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) [2022-02-11 01:12:26,296 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 264 transitions. [2022-02-11 01:12:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:12:26,297 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:26,297 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:26,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-11 01:12:26,510 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 [2022-02-11 01:12:26,510 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:26,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:26,511 INFO L85 PathProgramCache]: Analyzing trace with hash -582014845, now seen corresponding path program 6 times [2022-02-11 01:12:26,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:26,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903461538] [2022-02-11 01:12:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:26,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:26,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:26,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903461538] [2022-02-11 01:12:26,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903461538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:26,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777982351] [2022-02-11 01:12:26,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:12:26,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:26,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:26,694 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) [2022-02-11 01:12:26,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 01:12:26,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:12:26,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:26,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-11 01:12:26,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:27,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:27,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777982351] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:27,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:27,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 33 [2022-02-11 01:12:27,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997819776] [2022-02-11 01:12:27,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:27,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 01:12:27,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 01:12:27,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:12:27,584 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) [2022-02-11 01:12:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:29,135 INFO L93 Difference]: Finished difference Result 329 states and 643 transitions. [2022-02-11 01:12:29,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:12:29,135 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 [2022-02-11 01:12:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:29,136 INFO L225 Difference]: With dead ends: 329 [2022-02-11 01:12:29,137 INFO L226 Difference]: Without dead ends: 265 [2022-02-11 01:12:29,138 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=843, Invalid=3713, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 01:12:29,138 INFO L934 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 [2022-02-11 01:12:29,139 INFO L935 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] [2022-02-11 01:12:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-11 01:12:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 128. [2022-02-11 01:12:29,145 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) [2022-02-11 01:12:29,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 266 transitions. [2022-02-11 01:12:29,146 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 266 transitions. Word has length 22 [2022-02-11 01:12:29,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:29,146 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 266 transitions. [2022-02-11 01:12:29,147 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) [2022-02-11 01:12:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 266 transitions. [2022-02-11 01:12:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:12:29,148 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:29,148 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:29,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:29,359 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 [2022-02-11 01:12:29,359 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:29,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:29,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1739125057, now seen corresponding path program 7 times [2022-02-11 01:12:29,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:29,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881641326] [2022-02-11 01:12:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:29,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:29,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:29,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881641326] [2022-02-11 01:12:29,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881641326] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:29,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289377623] [2022-02-11 01:12:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:12:29,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:29,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:29,539 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) [2022-02-11 01:12:29,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 01:12:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:29,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 01:12:29,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:29,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:30,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289377623] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:30,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:30,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-02-11 01:12:30,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182269728] [2022-02-11 01:12:30,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:30,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:12:30,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:12:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:12:30,484 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) [2022-02-11 01:12:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:31,351 INFO L93 Difference]: Finished difference Result 234 states and 474 transitions. [2022-02-11 01:12:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 01:12:31,352 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 [2022-02-11 01:12:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:31,353 INFO L225 Difference]: With dead ends: 234 [2022-02-11 01:12:31,353 INFO L226 Difference]: Without dead ends: 205 [2022-02-11 01:12:31,354 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=439, Invalid=1631, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:12:31,354 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 166 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:31,354 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 89 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:12:31,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-11 01:12:31,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 128. [2022-02-11 01:12:31,360 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) [2022-02-11 01:12:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 266 transitions. [2022-02-11 01:12:31,361 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 266 transitions. Word has length 22 [2022-02-11 01:12:31,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:31,361 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 266 transitions. [2022-02-11 01:12:31,361 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) [2022-02-11 01:12:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 266 transitions. [2022-02-11 01:12:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-11 01:12:31,362 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:31,362 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:31,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:31,591 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 [2022-02-11 01:12:31,592 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:31,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:31,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1223751555, now seen corresponding path program 8 times [2022-02-11 01:12:31,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:31,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882858477] [2022-02-11 01:12:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:31,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:31,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:31,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882858477] [2022-02-11 01:12:31,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882858477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:31,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850524236] [2022-02-11 01:12:31,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:12:31,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:31,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:31,781 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) [2022-02-11 01:12:31,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 01:12:31,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:12:31,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:31,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 01:12:31,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:32,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:32,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850524236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:32,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:32,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-02-11 01:12:32,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990334894] [2022-02-11 01:12:32,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:32,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:12:32,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:12:32,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:12:32,778 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) [2022-02-11 01:12:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:33,845 INFO L93 Difference]: Finished difference Result 294 states and 585 transitions. [2022-02-11 01:12:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 01:12:33,845 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 [2022-02-11 01:12:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:33,846 INFO L225 Difference]: With dead ends: 294 [2022-02-11 01:12:33,846 INFO L226 Difference]: Without dead ends: 236 [2022-02-11 01:12:33,847 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=570, Invalid=2082, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 01:12:33,848 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 197 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-11 01:12:33,848 INFO L935 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] [2022-02-11 01:12:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-11 01:12:33,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 144. [2022-02-11 01:12:33,854 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) [2022-02-11 01:12:33,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 298 transitions. [2022-02-11 01:12:33,855 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 298 transitions. Word has length 22 [2022-02-11 01:12:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:33,855 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 298 transitions. [2022-02-11 01:12:33,855 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) [2022-02-11 01:12:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 298 transitions. [2022-02-11 01:12:33,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:12:33,856 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:33,856 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:33,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:34,079 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 [2022-02-11 01:12:34,079 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:34,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:34,080 INFO L85 PathProgramCache]: Analyzing trace with hash -276952247, now seen corresponding path program 9 times [2022-02-11 01:12:34,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:34,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827609589] [2022-02-11 01:12:34,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:34,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:12:34,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:34,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827609589] [2022-02-11 01:12:34,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827609589] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:34,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381373718] [2022-02-11 01:12:34,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:12:34,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:34,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:34,242 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) [2022-02-11 01:12:34,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 01:12:34,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:12:34,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:34,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:12:34,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:34,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:35,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381373718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:35,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:35,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-02-11 01:12:35,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437721666] [2022-02-11 01:12:35,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:35,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:12:35,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:35,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:12:35,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:12:35,457 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) [2022-02-11 01:12:36,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:36,467 INFO L93 Difference]: Finished difference Result 270 states and 507 transitions. [2022-02-11 01:12:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 01:12:36,468 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 [2022-02-11 01:12:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:36,469 INFO L225 Difference]: With dead ends: 270 [2022-02-11 01:12:36,469 INFO L226 Difference]: Without dead ends: 220 [2022-02-11 01:12:36,470 INFO L933 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 [2022-02-11 01:12:36,471 INFO L934 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 [2022-02-11 01:12:36,471 INFO L935 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] [2022-02-11 01:12:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-11 01:12:36,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 163. [2022-02-11 01:12:36,476 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) [2022-02-11 01:12:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 330 transitions. [2022-02-11 01:12:36,477 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 330 transitions. Word has length 24 [2022-02-11 01:12:36,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:36,477 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 330 transitions. [2022-02-11 01:12:36,477 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) [2022-02-11 01:12:36,477 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 330 transitions. [2022-02-11 01:12:36,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:12:36,479 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:36,479 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:36,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:36,695 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 [2022-02-11 01:12:36,695 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:36,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1905230277, now seen corresponding path program 10 times [2022-02-11 01:12:36,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:36,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612866144] [2022-02-11 01:12:36,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:36,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:36,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:36,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612866144] [2022-02-11 01:12:36,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612866144] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:36,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836956793] [2022-02-11 01:12:36,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:12:36,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:36,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:36,852 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) [2022-02-11 01:12:36,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 01:12:36,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:12:36,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:36,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:12:36,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:37,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:38,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836956793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:38,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:38,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-02-11 01:12:38,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807230492] [2022-02-11 01:12:38,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:38,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:12:38,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:38,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:12:38,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:12:38,140 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) [2022-02-11 01:12:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:39,526 INFO L93 Difference]: Finished difference Result 270 states and 508 transitions. [2022-02-11 01:12:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:12:39,526 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 [2022-02-11 01:12:39,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:39,541 INFO L225 Difference]: With dead ends: 270 [2022-02-11 01:12:39,541 INFO L226 Difference]: Without dead ends: 245 [2022-02-11 01:12:39,542 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=797, Invalid=3493, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 01:12:39,542 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 221 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:39,543 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 164 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:12:39,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-11 01:12:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2022-02-11 01:12:39,555 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) [2022-02-11 01:12:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 332 transitions. [2022-02-11 01:12:39,556 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 332 transitions. Word has length 24 [2022-02-11 01:12:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:39,556 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 332 transitions. [2022-02-11 01:12:39,556 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) [2022-02-11 01:12:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 332 transitions. [2022-02-11 01:12:39,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:12:39,558 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:39,558 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:39,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:39,795 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 [2022-02-11 01:12:39,795 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:39,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:39,796 INFO L85 PathProgramCache]: Analyzing trace with hash 290399277, now seen corresponding path program 11 times [2022-02-11 01:12:39,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:39,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41081960] [2022-02-11 01:12:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:39,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:39,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:39,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41081960] [2022-02-11 01:12:39,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41081960] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:39,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035962757] [2022-02-11 01:12:39,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:12:39,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:39,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:39,995 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) [2022-02-11 01:12:39,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 01:12:40,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:12:40,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:40,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:12:40,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:40,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:41,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035962757] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:41,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:41,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-02-11 01:12:41,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026348459] [2022-02-11 01:12:41,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:41,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:12:41,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:41,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:12:41,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:12:41,490 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) [2022-02-11 01:12:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:44,536 INFO L93 Difference]: Finished difference Result 366 states and 702 transitions. [2022-02-11 01:12:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:12:44,536 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 [2022-02-11 01:12:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:44,538 INFO L225 Difference]: With dead ends: 366 [2022-02-11 01:12:44,538 INFO L226 Difference]: Without dead ends: 288 [2022-02-11 01:12:44,539 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=744, Invalid=4086, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 01:12:44,540 INFO L934 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:44,540 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 195 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:12:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-11 01:12:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 192. [2022-02-11 01:12:44,546 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) [2022-02-11 01:12:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 390 transitions. [2022-02-11 01:12:44,547 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 390 transitions. Word has length 24 [2022-02-11 01:12:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:44,549 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 390 transitions. [2022-02-11 01:12:44,549 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) [2022-02-11 01:12:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 390 transitions. [2022-02-11 01:12:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-11 01:12:44,551 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:44,551 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:44,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:44,751 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 [2022-02-11 01:12:44,752 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:44,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2130799989, now seen corresponding path program 12 times [2022-02-11 01:12:44,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:44,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545245871] [2022-02-11 01:12:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:44,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:44,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:44,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545245871] [2022-02-11 01:12:44,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545245871] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:44,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401829241] [2022-02-11 01:12:44,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:12:44,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:44,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:44,949 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) [2022-02-11 01:12:44,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 01:12:44,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:12:44,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:44,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:12:44,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:45,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:46,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401829241] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:46,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:46,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-02-11 01:12:46,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034356569] [2022-02-11 01:12:46,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:46,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 01:12:46,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:46,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 01:12:46,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 01:12:46,307 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) [2022-02-11 01:12:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:47,049 INFO L93 Difference]: Finished difference Result 272 states and 544 transitions. [2022-02-11 01:12:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 01:12:47,049 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 [2022-02-11 01:12:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:47,050 INFO L225 Difference]: With dead ends: 272 [2022-02-11 01:12:47,050 INFO L226 Difference]: Without dead ends: 246 [2022-02-11 01:12:47,050 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=427, Invalid=1925, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 01:12:47,051 INFO L934 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 [2022-02-11 01:12:47,051 INFO L935 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] [2022-02-11 01:12:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-02-11 01:12:47,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 165. [2022-02-11 01:12:47,055 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) [2022-02-11 01:12:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 336 transitions. [2022-02-11 01:12:47,056 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 336 transitions. Word has length 24 [2022-02-11 01:12:47,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:47,056 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 336 transitions. [2022-02-11 01:12:47,056 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) [2022-02-11 01:12:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 336 transitions. [2022-02-11 01:12:47,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:12:47,057 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:47,057 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:47,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:47,263 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 [2022-02-11 01:12:47,263 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:47,264 INFO L85 PathProgramCache]: Analyzing trace with hash -144321993, now seen corresponding path program 13 times [2022-02-11 01:12:47,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:47,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939619888] [2022-02-11 01:12:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:47,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:47,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:47,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939619888] [2022-02-11 01:12:47,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939619888] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:47,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570464879] [2022-02-11 01:12:47,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:12:47,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:47,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:47,587 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) [2022-02-11 01:12:47,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 01:12:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 01:12:47,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:48,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:49,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570464879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:49,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:49,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-02-11 01:12:49,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039920838] [2022-02-11 01:12:49,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:49,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-11 01:12:49,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:49,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-11 01:12:49,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:12:49,005 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) [2022-02-11 01:12:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:53,959 INFO L93 Difference]: Finished difference Result 651 states and 1266 transitions. [2022-02-11 01:12:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-11 01:12:53,959 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 [2022-02-11 01:12:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:53,964 INFO L225 Difference]: With dead ends: 651 [2022-02-11 01:12:53,964 INFO L226 Difference]: Without dead ends: 586 [2022-02-11 01:12:53,967 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5895 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2834, Invalid=12666, Unknown=0, NotChecked=0, Total=15500 [2022-02-11 01:12:53,968 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 477 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:53,968 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 299 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:12:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-02-11 01:12:53,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 248. [2022-02-11 01:12:53,976 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) [2022-02-11 01:12:53,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 530 transitions. [2022-02-11 01:12:53,977 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 530 transitions. Word has length 27 [2022-02-11 01:12:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:53,977 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 530 transitions. [2022-02-11 01:12:53,977 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) [2022-02-11 01:12:53,978 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 530 transitions. [2022-02-11 01:12:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:12:53,978 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:53,978 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:54,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-11 01:12:54,191 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 [2022-02-11 01:12:54,191 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:54,192 INFO L85 PathProgramCache]: Analyzing trace with hash -193889737, now seen corresponding path program 14 times [2022-02-11 01:12:54,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:54,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428770881] [2022-02-11 01:12:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:54,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:54,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:54,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428770881] [2022-02-11 01:12:54,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428770881] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:54,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058305228] [2022-02-11 01:12:54,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:12:54,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:54,413 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) [2022-02-11 01:12:54,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 01:12:54,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:12:54,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:54,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 01:12:54,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:55,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:55,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058305228] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:55,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:55,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-02-11 01:12:55,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873145935] [2022-02-11 01:12:55,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:55,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-11 01:12:55,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:55,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-11 01:12:55,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:12:55,817 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) [2022-02-11 01:13:00,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:00,722 INFO L93 Difference]: Finished difference Result 688 states and 1359 transitions. [2022-02-11 01:13:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-11 01:13:00,722 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 [2022-02-11 01:13:00,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:00,724 INFO L225 Difference]: With dead ends: 688 [2022-02-11 01:13:00,724 INFO L226 Difference]: Without dead ends: 623 [2022-02-11 01:13:00,726 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6815 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3106, Invalid=15526, Unknown=0, NotChecked=0, Total=18632 [2022-02-11 01:13:00,726 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 553 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:00,726 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 275 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:13:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-02-11 01:13:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 274. [2022-02-11 01:13:00,734 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) [2022-02-11 01:13:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 592 transitions. [2022-02-11 01:13:00,735 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 592 transitions. Word has length 27 [2022-02-11 01:13:00,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:00,736 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 592 transitions. [2022-02-11 01:13:00,736 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) [2022-02-11 01:13:00,736 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 592 transitions. [2022-02-11 01:13:00,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:00,737 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:00,737 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:00,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:00,951 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 [2022-02-11 01:13:00,951 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:00,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:00,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1874386377, now seen corresponding path program 15 times [2022-02-11 01:13:00,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:00,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091500189] [2022-02-11 01:13:00,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:00,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:01,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:01,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091500189] [2022-02-11 01:13:01,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091500189] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:01,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917420229] [2022-02-11 01:13:01,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:01,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:01,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:01,196 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) [2022-02-11 01:13:01,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 01:13:01,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:13:01,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:01,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 01:13:01,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:01,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:02,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917420229] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:02,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:02,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-02-11 01:13:02,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844496372] [2022-02-11 01:13:02,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:02,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-11 01:13:02,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:02,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-11 01:13:02,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:13:02,580 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) [2022-02-11 01:13:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:07,021 INFO L93 Difference]: Finished difference Result 717 states and 1446 transitions. [2022-02-11 01:13:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-11 01:13:07,021 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 [2022-02-11 01:13:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:07,024 INFO L225 Difference]: With dead ends: 717 [2022-02-11 01:13:07,024 INFO L226 Difference]: Without dead ends: 659 [2022-02-11 01:13:07,026 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6823 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3101, Invalid=15805, Unknown=0, NotChecked=0, Total=18906 [2022-02-11 01:13:07,026 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 614 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:07,026 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 261 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 01:13:07,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-02-11 01:13:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 305. [2022-02-11 01:13:07,036 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) [2022-02-11 01:13:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 671 transitions. [2022-02-11 01:13:07,037 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 671 transitions. Word has length 27 [2022-02-11 01:13:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:07,037 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 671 transitions. [2022-02-11 01:13:07,037 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) [2022-02-11 01:13:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 671 transitions. [2022-02-11 01:13:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:07,038 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:07,038 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:07,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:07,261 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 [2022-02-11 01:13:07,261 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:07,261 INFO L85 PathProgramCache]: Analyzing trace with hash -177812937, now seen corresponding path program 16 times [2022-02-11 01:13:07,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:07,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873537100] [2022-02-11 01:13:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:07,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:07,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:07,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873537100] [2022-02-11 01:13:07,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873537100] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:07,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904049541] [2022-02-11 01:13:07,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:13:07,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:07,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:07,467 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) [2022-02-11 01:13:07,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 01:13:07,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:13:07,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:07,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 01:13:07,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:08,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:08,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904049541] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:08,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:08,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 41 [2022-02-11 01:13:08,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535874047] [2022-02-11 01:13:08,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:08,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-11 01:13:08,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:08,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-11 01:13:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:13:08,618 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) [2022-02-11 01:13:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:15,643 INFO L93 Difference]: Finished difference Result 852 states and 1700 transitions. [2022-02-11 01:13:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-02-11 01:13:15,643 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 [2022-02-11 01:13:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:15,646 INFO L225 Difference]: With dead ends: 852 [2022-02-11 01:13:15,646 INFO L226 Difference]: Without dead ends: 750 [2022-02-11 01:13:15,648 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11383 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4461, Invalid=25295, Unknown=0, NotChecked=0, Total=29756 [2022-02-11 01:13:15,649 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 708 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 2759 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:15,649 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 367 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2759 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 01:13:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-02-11 01:13:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 303. [2022-02-11 01:13:15,657 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) [2022-02-11 01:13:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 665 transitions. [2022-02-11 01:13:15,659 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 665 transitions. Word has length 27 [2022-02-11 01:13:15,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:15,659 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 665 transitions. [2022-02-11 01:13:15,659 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) [2022-02-11 01:13:15,659 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 665 transitions. [2022-02-11 01:13:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:15,660 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:15,660 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:15,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:15,873 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 [2022-02-11 01:13:15,873 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:15,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1711244881, now seen corresponding path program 17 times [2022-02-11 01:13:15,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:15,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984250262] [2022-02-11 01:13:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:15,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:16,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:16,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984250262] [2022-02-11 01:13:16,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984250262] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:16,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471318514] [2022-02-11 01:13:16,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:13:16,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:16,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:16,123 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) [2022-02-11 01:13:16,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 01:13:16,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:13:16,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:16,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 01:13:16,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:16,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:17,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471318514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:17,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:17,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2022-02-11 01:13:17,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761904663] [2022-02-11 01:13:17,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:17,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-11 01:13:17,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-11 01:13:17,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1472, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:13:17,305 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) [2022-02-11 01:13:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:21,408 INFO L93 Difference]: Finished difference Result 798 states and 1598 transitions. [2022-02-11 01:13:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-11 01:13:21,411 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 [2022-02-11 01:13:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:21,414 INFO L225 Difference]: With dead ends: 798 [2022-02-11 01:13:21,414 INFO L226 Difference]: Without dead ends: 682 [2022-02-11 01:13:21,415 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5509 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2627, Invalid=13885, Unknown=0, NotChecked=0, Total=16512 [2022-02-11 01:13:21,416 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 647 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:21,416 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 268 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:13:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-11 01:13:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 333. [2022-02-11 01:13:21,424 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) [2022-02-11 01:13:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 735 transitions. [2022-02-11 01:13:21,425 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 735 transitions. Word has length 27 [2022-02-11 01:13:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:21,425 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 735 transitions. [2022-02-11 01:13:21,425 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) [2022-02-11 01:13:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 735 transitions. [2022-02-11 01:13:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:21,426 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:21,426 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:21,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:21,646 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 [2022-02-11 01:13:21,646 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:21,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:21,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1426612203, now seen corresponding path program 18 times [2022-02-11 01:13:21,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:21,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244119492] [2022-02-11 01:13:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:21,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:21,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:21,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244119492] [2022-02-11 01:13:21,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244119492] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:21,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370503993] [2022-02-11 01:13:21,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:13:21,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:21,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:21,832 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) [2022-02-11 01:13:21,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 01:13:21,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:13:21,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:21,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:13:21,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:22,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:23,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370503993] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:23,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:23,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-02-11 01:13:23,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804823017] [2022-02-11 01:13:23,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:23,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 01:13:23,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:23,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 01:13:23,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:13:23,126 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) [2022-02-11 01:13:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:26,655 INFO L93 Difference]: Finished difference Result 716 states and 1447 transitions. [2022-02-11 01:13:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-11 01:13:26,655 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 [2022-02-11 01:13:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:26,657 INFO L225 Difference]: With dead ends: 716 [2022-02-11 01:13:26,657 INFO L226 Difference]: Without dead ends: 620 [2022-02-11 01:13:26,658 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3779 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1995, Invalid=9135, Unknown=0, NotChecked=0, Total=11130 [2022-02-11 01:13:26,658 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 466 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:26,658 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 236 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:13:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-02-11 01:13:26,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 333. [2022-02-11 01:13:26,667 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) [2022-02-11 01:13:26,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 735 transitions. [2022-02-11 01:13:26,668 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 735 transitions. Word has length 27 [2022-02-11 01:13:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:26,668 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 735 transitions. [2022-02-11 01:13:26,668 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) [2022-02-11 01:13:26,668 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 735 transitions. [2022-02-11 01:13:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:26,669 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:26,669 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:26,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:26,893 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 [2022-02-11 01:13:26,893 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:26,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:26,894 INFO L85 PathProgramCache]: Analyzing trace with hash 648255859, now seen corresponding path program 19 times [2022-02-11 01:13:26,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:26,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739537225] [2022-02-11 01:13:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:26,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:27,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:27,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739537225] [2022-02-11 01:13:27,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739537225] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:27,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955580344] [2022-02-11 01:13:27,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:13:27,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:27,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:27,108 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) [2022-02-11 01:13:27,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 01:13:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:27,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 01:13:27,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:27,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:28,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955580344] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:28,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:28,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-02-11 01:13:28,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359905749] [2022-02-11 01:13:28,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:28,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-11 01:13:28,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:28,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-11 01:13:28,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:13:28,503 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) [2022-02-11 01:13:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:32,089 INFO L93 Difference]: Finished difference Result 829 states and 1722 transitions. [2022-02-11 01:13:32,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-11 01:13:32,089 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 [2022-02-11 01:13:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:32,091 INFO L225 Difference]: With dead ends: 829 [2022-02-11 01:13:32,091 INFO L226 Difference]: Without dead ends: 764 [2022-02-11 01:13:32,092 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2169, Invalid=10263, Unknown=0, NotChecked=0, Total=12432 [2022-02-11 01:13:32,092 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 475 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:32,093 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 273 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:13:32,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-02-11 01:13:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 413. [2022-02-11 01:13:32,106 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) [2022-02-11 01:13:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 927 transitions. [2022-02-11 01:13:32,108 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 927 transitions. Word has length 27 [2022-02-11 01:13:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:32,108 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 927 transitions. [2022-02-11 01:13:32,108 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) [2022-02-11 01:13:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 927 transitions. [2022-02-11 01:13:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:32,111 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:32,111 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:32,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-02-11 01:13:32,331 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 [2022-02-11 01:13:32,331 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:32,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:32,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1950137997, now seen corresponding path program 20 times [2022-02-11 01:13:32,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:32,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485699725] [2022-02-11 01:13:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:32,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:32,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:32,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485699725] [2022-02-11 01:13:32,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485699725] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:32,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116635486] [2022-02-11 01:13:32,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:32,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:32,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:32,844 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) [2022-02-11 01:13:32,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 01:13:32,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:32,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 01:13:32,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:33,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:34,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116635486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:34,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:34,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2022-02-11 01:13:34,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022856028] [2022-02-11 01:13:34,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:34,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-11 01:13:34,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:34,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-11 01:13:34,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:13:34,077 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) [2022-02-11 01:13:40,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:40,389 INFO L93 Difference]: Finished difference Result 887 states and 1850 transitions. [2022-02-11 01:13:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-11 01:13:40,389 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 [2022-02-11 01:13:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:40,392 INFO L225 Difference]: With dead ends: 887 [2022-02-11 01:13:40,392 INFO L226 Difference]: Without dead ends: 771 [2022-02-11 01:13:40,393 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6515 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3071, Invalid=15835, Unknown=0, NotChecked=0, Total=18906 [2022-02-11 01:13:40,395 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 633 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:40,395 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 224 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:13:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-02-11 01:13:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 423. [2022-02-11 01:13:40,422 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) [2022-02-11 01:13:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 944 transitions. [2022-02-11 01:13:40,423 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 944 transitions. Word has length 27 [2022-02-11 01:13:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:40,424 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 944 transitions. [2022-02-11 01:13:40,424 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) [2022-02-11 01:13:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 944 transitions. [2022-02-11 01:13:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:40,425 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:40,425 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:40,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:40,645 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 [2022-02-11 01:13:40,646 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1187719087, now seen corresponding path program 21 times [2022-02-11 01:13:40,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:40,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137412980] [2022-02-11 01:13:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:40,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:40,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:40,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137412980] [2022-02-11 01:13:40,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137412980] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:40,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127282969] [2022-02-11 01:13:40,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:40,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:40,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:40,847 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) [2022-02-11 01:13:40,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 01:13:40,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:13:40,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:40,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:13:40,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:41,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:42,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127282969] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:42,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:42,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-02-11 01:13:42,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318272356] [2022-02-11 01:13:42,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:42,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 01:13:42,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 01:13:42,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:13:42,111 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) [2022-02-11 01:13:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:45,537 INFO L93 Difference]: Finished difference Result 816 states and 1693 transitions. [2022-02-11 01:13:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-11 01:13:45,537 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 [2022-02-11 01:13:45,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:45,540 INFO L225 Difference]: With dead ends: 816 [2022-02-11 01:13:45,540 INFO L226 Difference]: Without dead ends: 720 [2022-02-11 01:13:45,541 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2270, Invalid=9940, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 01:13:45,541 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 452 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:45,542 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 235 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:13:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-02-11 01:13:45,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 377. [2022-02-11 01:13:45,549 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) [2022-02-11 01:13:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 836 transitions. [2022-02-11 01:13:45,550 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 836 transitions. Word has length 27 [2022-02-11 01:13:45,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:45,551 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 836 transitions. [2022-02-11 01:13:45,551 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) [2022-02-11 01:13:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 836 transitions. [2022-02-11 01:13:45,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:45,552 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:45,552 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:45,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:45,767 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 [2022-02-11 01:13:45,767 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:45,768 INFO L85 PathProgramCache]: Analyzing trace with hash -144371597, now seen corresponding path program 22 times [2022-02-11 01:13:45,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:45,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141661735] [2022-02-11 01:13:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:45,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:46,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:46,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141661735] [2022-02-11 01:13:46,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141661735] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:46,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315134767] [2022-02-11 01:13:46,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:13:46,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:46,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:46,028 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) [2022-02-11 01:13:46,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 01:13:46,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:13:46,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:46,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:13:46,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:46,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:47,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315134767] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:47,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:47,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-02-11 01:13:47,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015227009] [2022-02-11 01:13:47,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:47,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 01:13:47,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:47,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 01:13:47,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:13:47,556 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) [2022-02-11 01:13:53,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:53,573 INFO L93 Difference]: Finished difference Result 932 states and 1908 transitions. [2022-02-11 01:13:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-11 01:13:53,574 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 [2022-02-11 01:13:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:53,576 INFO L225 Difference]: With dead ends: 932 [2022-02-11 01:13:53,576 INFO L226 Difference]: Without dead ends: 836 [2022-02-11 01:13:53,578 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5616 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3006, Invalid=13250, Unknown=0, NotChecked=0, Total=16256 [2022-02-11 01:13:53,578 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 517 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:53,578 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 265 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 01:13:53,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-02-11 01:13:53,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 422. [2022-02-11 01:13:53,587 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) [2022-02-11 01:13:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 940 transitions. [2022-02-11 01:13:53,588 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 940 transitions. Word has length 27 [2022-02-11 01:13:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:53,589 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 940 transitions. [2022-02-11 01:13:53,589 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) [2022-02-11 01:13:53,589 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 940 transitions. [2022-02-11 01:13:53,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:13:53,590 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:53,590 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:53,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:53,803 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 [2022-02-11 01:13:53,803 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:53,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:53,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1153733039, now seen corresponding path program 23 times [2022-02-11 01:13:53,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:53,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156803999] [2022-02-11 01:13:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:53,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:53,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:53,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156803999] [2022-02-11 01:13:53,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156803999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:53,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747381041] [2022-02-11 01:13:53,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:13:53,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:53,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:53,964 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) [2022-02-11 01:13:53,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 01:13:53,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:13:53,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:53,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:13:53,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:54,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:55,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747381041] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:55,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:55,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-02-11 01:13:55,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830262589] [2022-02-11 01:13:55,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:55,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-11 01:13:55,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:55,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-11 01:13:55,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:13:55,353 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) [2022-02-11 01:14:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:01,558 INFO L93 Difference]: Finished difference Result 1266 states and 2595 transitions. [2022-02-11 01:14:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-11 01:14:01,559 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 [2022-02-11 01:14:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:01,563 INFO L225 Difference]: With dead ends: 1266 [2022-02-11 01:14:01,563 INFO L226 Difference]: Without dead ends: 1245 [2022-02-11 01:14:01,565 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6389 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3474, Invalid=14082, Unknown=0, NotChecked=0, Total=17556 [2022-02-11 01:14:01,565 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 537 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:01,565 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 337 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:14:01,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-02-11 01:14:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 543. [2022-02-11 01:14:01,578 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) [2022-02-11 01:14:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1233 transitions. [2022-02-11 01:14:01,580 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1233 transitions. Word has length 27 [2022-02-11 01:14:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:01,580 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1233 transitions. [2022-02-11 01:14:01,580 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) [2022-02-11 01:14:01,580 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1233 transitions. [2022-02-11 01:14:01,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:01,581 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:01,581 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:01,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:01,796 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 [2022-02-11 01:14:01,797 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:01,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1444660817, now seen corresponding path program 24 times [2022-02-11 01:14:01,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:01,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066441365] [2022-02-11 01:14:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:01,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:01,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:01,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066441365] [2022-02-11 01:14:01,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066441365] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:01,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030600152] [2022-02-11 01:14:01,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:14:01,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:01,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:01,996 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) [2022-02-11 01:14:01,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 01:14:02,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:14:02,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:02,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 01:14:02,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:02,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:03,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030600152] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:03,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:03,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-02-11 01:14:03,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859246010] [2022-02-11 01:14:03,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:03,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 01:14:03,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 01:14:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:14:03,219 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) [2022-02-11 01:14:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:11,684 INFO L93 Difference]: Finished difference Result 1451 states and 3008 transitions. [2022-02-11 01:14:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-02-11 01:14:11,684 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 [2022-02-11 01:14:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:11,688 INFO L225 Difference]: With dead ends: 1451 [2022-02-11 01:14:11,689 INFO L226 Difference]: Without dead ends: 1380 [2022-02-11 01:14:11,690 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12620 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=5319, Invalid=27261, Unknown=0, NotChecked=0, Total=32580 [2022-02-11 01:14:11,691 INFO L934 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 [2022-02-11 01:14:11,691 INFO L935 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] [2022-02-11 01:14:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-02-11 01:14:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 579. [2022-02-11 01:14:11,704 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) [2022-02-11 01:14:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1319 transitions. [2022-02-11 01:14:11,706 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1319 transitions. Word has length 27 [2022-02-11 01:14:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:11,706 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1319 transitions. [2022-02-11 01:14:11,706 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) [2022-02-11 01:14:11,706 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1319 transitions. [2022-02-11 01:14:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:11,707 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:11,707 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:11,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:11,923 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 [2022-02-11 01:14:11,923 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:11,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1693196267, now seen corresponding path program 25 times [2022-02-11 01:14:11,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:11,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514898150] [2022-02-11 01:14:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:11,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:12,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:12,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514898150] [2022-02-11 01:14:12,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514898150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:12,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062624415] [2022-02-11 01:14:12,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:14:12,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:12,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:12,096 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) [2022-02-11 01:14:12,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 01:14:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:12,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:14:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:12,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:13,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062624415] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:13,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:13,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-02-11 01:14:13,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48946172] [2022-02-11 01:14:13,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:13,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-11 01:14:13,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:13,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-11 01:14:13,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 01:14:13,310 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) [2022-02-11 01:14:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:22,169 INFO L93 Difference]: Finished difference Result 1709 states and 3584 transitions. [2022-02-11 01:14:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-02-11 01:14:22,169 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 [2022-02-11 01:14:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:22,173 INFO L225 Difference]: With dead ends: 1709 [2022-02-11 01:14:22,173 INFO L226 Difference]: Without dead ends: 1641 [2022-02-11 01:14:22,174 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12214 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=5391, Invalid=25409, Unknown=0, NotChecked=0, Total=30800 [2022-02-11 01:14:22,175 INFO L934 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, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:22,175 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 446 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2272 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 01:14:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2022-02-11 01:14:22,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 724. [2022-02-11 01:14:22,191 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) [2022-02-11 01:14:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1651 transitions. [2022-02-11 01:14:22,193 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1651 transitions. Word has length 27 [2022-02-11 01:14:22,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:22,193 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 1651 transitions. [2022-02-11 01:14:22,193 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) [2022-02-11 01:14:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1651 transitions. [2022-02-11 01:14:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:22,194 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:22,194 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:22,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:22,417 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 [2022-02-11 01:14:22,417 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1820958903, now seen corresponding path program 26 times [2022-02-11 01:14:22,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:22,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951515795] [2022-02-11 01:14:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:22,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:14:22,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:22,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951515795] [2022-02-11 01:14:22,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951515795] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:22,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850138414] [2022-02-11 01:14:22,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:14:22,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:22,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:22,600 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) [2022-02-11 01:14:22,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 01:14:22,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:14:22,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:22,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:14:22,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:23,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:23,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850138414] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:23,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:23,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-02-11 01:14:23,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922821879] [2022-02-11 01:14:23,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:23,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-11 01:14:23,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:23,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-11 01:14:23,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1431, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:14:23,867 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) [2022-02-11 01:14:27,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:27,436 INFO L93 Difference]: Finished difference Result 1358 states and 2916 transitions. [2022-02-11 01:14:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-11 01:14:27,437 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 [2022-02-11 01:14:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:27,441 INFO L225 Difference]: With dead ends: 1358 [2022-02-11 01:14:27,442 INFO L226 Difference]: Without dead ends: 1293 [2022-02-11 01:14:27,442 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3323 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1799, Invalid=7903, Unknown=0, NotChecked=0, Total=9702 [2022-02-11 01:14:27,443 INFO L934 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 [2022-02-11 01:14:27,443 INFO L935 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] [2022-02-11 01:14:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-02-11 01:14:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 833. [2022-02-11 01:14:27,459 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) [2022-02-11 01:14:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1908 transitions. [2022-02-11 01:14:27,461 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1908 transitions. Word has length 27 [2022-02-11 01:14:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:27,462 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1908 transitions. [2022-02-11 01:14:27,462 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) [2022-02-11 01:14:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1908 transitions. [2022-02-11 01:14:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:27,463 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:27,464 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:27,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:27,683 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 [2022-02-11 01:14:27,683 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 140462263, now seen corresponding path program 27 times [2022-02-11 01:14:27,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:27,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708919935] [2022-02-11 01:14:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:27,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:14:27,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:27,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708919935] [2022-02-11 01:14:27,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708919935] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:27,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020795214] [2022-02-11 01:14:27,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:14:27,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:27,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:27,873 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) [2022-02-11 01:14:27,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 01:14:27,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:14:27,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:27,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:14:27,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:28,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:29,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020795214] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:29,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:29,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-02-11 01:14:29,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630107491] [2022-02-11 01:14:29,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:29,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-11 01:14:29,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:29,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-11 01:14:29,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:14:29,093 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) [2022-02-11 01:14:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:32,565 INFO L93 Difference]: Finished difference Result 1227 states and 2641 transitions. [2022-02-11 01:14:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-11 01:14:32,565 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 [2022-02-11 01:14:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:32,568 INFO L225 Difference]: With dead ends: 1227 [2022-02-11 01:14:32,568 INFO L226 Difference]: Without dead ends: 1213 [2022-02-11 01:14:32,569 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3427 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1752, Invalid=8348, Unknown=0, NotChecked=0, Total=10100 [2022-02-11 01:14:32,570 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 502 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:32,570 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 219 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:14:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-02-11 01:14:32,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 859. [2022-02-11 01:14:32,584 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) [2022-02-11 01:14:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1970 transitions. [2022-02-11 01:14:32,586 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1970 transitions. Word has length 27 [2022-02-11 01:14:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:32,586 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1970 transitions. [2022-02-11 01:14:32,586 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) [2022-02-11 01:14:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1970 transitions. [2022-02-11 01:14:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:32,588 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:32,588 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:32,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:32,806 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 [2022-02-11 01:14:32,807 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:32,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1837035703, now seen corresponding path program 28 times [2022-02-11 01:14:32,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:32,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691535458] [2022-02-11 01:14:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:32,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:14:33,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:33,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691535458] [2022-02-11 01:14:33,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691535458] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:33,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595076538] [2022-02-11 01:14:33,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:14:33,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:33,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:33,066 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) [2022-02-11 01:14:33,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 01:14:33,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:14:33,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:33,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:14:33,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:33,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:34,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595076538] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:34,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:34,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-02-11 01:14:34,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885179846] [2022-02-11 01:14:34,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:34,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 01:14:34,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:34,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 01:14:34,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:14:34,422 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) [2022-02-11 01:14:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:40,063 INFO L93 Difference]: Finished difference Result 1463 states and 3165 transitions. [2022-02-11 01:14:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-11 01:14:40,063 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 [2022-02-11 01:14:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:40,067 INFO L225 Difference]: With dead ends: 1463 [2022-02-11 01:14:40,067 INFO L226 Difference]: Without dead ends: 1361 [2022-02-11 01:14:40,068 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6445 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2835, Invalid=14987, Unknown=0, NotChecked=0, Total=17822 [2022-02-11 01:14:40,068 INFO L934 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 [2022-02-11 01:14:40,068 INFO L935 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] [2022-02-11 01:14:40,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-02-11 01:14:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 857. [2022-02-11 01:14:40,084 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) [2022-02-11 01:14:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1964 transitions. [2022-02-11 01:14:40,086 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1964 transitions. Word has length 27 [2022-02-11 01:14:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:40,086 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1964 transitions. [2022-02-11 01:14:40,086 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) [2022-02-11 01:14:40,087 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1964 transitions. [2022-02-11 01:14:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:40,098 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:40,098 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:40,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:40,298 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 [2022-02-11 01:14:40,298 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:40,299 INFO L85 PathProgramCache]: Analyzing trace with hash -778012489, now seen corresponding path program 29 times [2022-02-11 01:14:40,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:40,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855383295] [2022-02-11 01:14:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:40,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:14:40,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:40,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855383295] [2022-02-11 01:14:40,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855383295] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:40,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140328401] [2022-02-11 01:14:40,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:14:40,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:40,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:40,504 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) [2022-02-11 01:14:40,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 01:14:40,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:14:40,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:40,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 01:14:40,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:41,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:42,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140328401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:42,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:42,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-02-11 01:14:42,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107002764] [2022-02-11 01:14:42,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:42,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-11 01:14:42,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:42,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-11 01:14:42,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:14:42,097 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) [2022-02-11 01:14:46,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:46,306 INFO L93 Difference]: Finished difference Result 1458 states and 3123 transitions. [2022-02-11 01:14:46,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-11 01:14:46,307 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 [2022-02-11 01:14:46,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:46,311 INFO L225 Difference]: With dead ends: 1458 [2022-02-11 01:14:46,311 INFO L226 Difference]: Without dead ends: 1400 [2022-02-11 01:14:46,312 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3385 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1851, Invalid=8451, Unknown=0, NotChecked=0, Total=10302 [2022-02-11 01:14:46,312 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 366 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:46,313 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 262 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:14:46,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-02-11 01:14:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 888. [2022-02-11 01:14:46,328 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) [2022-02-11 01:14:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2036 transitions. [2022-02-11 01:14:46,330 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2036 transitions. Word has length 27 [2022-02-11 01:14:46,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:46,330 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 2036 transitions. [2022-02-11 01:14:46,330 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) [2022-02-11 01:14:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2036 transitions. [2022-02-11 01:14:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:46,332 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:46,332 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:46,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-11 01:14:46,547 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 [2022-02-11 01:14:46,547 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash 918560951, now seen corresponding path program 30 times [2022-02-11 01:14:46,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:46,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176549417] [2022-02-11 01:14:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:46,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:14:46,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:46,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176549417] [2022-02-11 01:14:46,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176549417] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:46,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954850207] [2022-02-11 01:14:46,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:14:46,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:46,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:46,785 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) [2022-02-11 01:14:46,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 01:14:46,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:14:46,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:46,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 01:14:46,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:47,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:48,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954850207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:48,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:48,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-02-11 01:14:48,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975569820] [2022-02-11 01:14:48,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:48,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 01:14:48,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 01:14:48,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:14:48,331 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) [2022-02-11 01:14:54,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:54,278 INFO L93 Difference]: Finished difference Result 1565 states and 3427 transitions. [2022-02-11 01:14:54,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-11 01:14:54,279 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 [2022-02-11 01:14:54,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:54,284 INFO L225 Difference]: With dead ends: 1565 [2022-02-11 01:14:54,285 INFO L226 Difference]: Without dead ends: 1463 [2022-02-11 01:14:54,286 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5381 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2608, Invalid=13394, Unknown=0, NotChecked=0, Total=16002 [2022-02-11 01:14:54,286 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 607 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:54,286 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 219 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:14:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-02-11 01:14:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 915. [2022-02-11 01:14:54,346 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) [2022-02-11 01:14:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2099 transitions. [2022-02-11 01:14:54,347 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2099 transitions. Word has length 27 [2022-02-11 01:14:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:54,348 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2099 transitions. [2022-02-11 01:14:54,348 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) [2022-02-11 01:14:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2099 transitions. [2022-02-11 01:14:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:14:54,349 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:54,349 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:54,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:54,556 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 [2022-02-11 01:14:54,556 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:54,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash -238549261, now seen corresponding path program 31 times [2022-02-11 01:14:54,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:54,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384890328] [2022-02-11 01:14:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:54,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:14:54,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:54,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384890328] [2022-02-11 01:14:54,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384890328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:54,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053010386] [2022-02-11 01:14:54,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:14:54,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:54,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:54,848 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) [2022-02-11 01:14:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:54,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 01:14:54,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:14:54,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:55,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:56,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053010386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:56,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:56,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-02-11 01:14:56,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717628810] [2022-02-11 01:14:56,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:56,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-11 01:14:56,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:56,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-11 01:14:56,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 01:14:56,262 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) [2022-02-11 01:15:01,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:01,095 INFO L93 Difference]: Finished difference Result 1839 states and 4025 transitions. [2022-02-11 01:15:01,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-11 01:15:01,095 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 [2022-02-11 01:15:01,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:01,101 INFO L225 Difference]: With dead ends: 1839 [2022-02-11 01:15:01,101 INFO L226 Difference]: Without dead ends: 1743 [2022-02-11 01:15:01,102 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4368 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2389, Invalid=10721, Unknown=0, NotChecked=0, Total=13110 [2022-02-11 01:15:01,103 INFO L934 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:01,103 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 253 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:15:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-02-11 01:15:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 932. [2022-02-11 01:15:01,147 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) [2022-02-11 01:15:01,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2139 transitions. [2022-02-11 01:15:01,149 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2139 transitions. Word has length 27 [2022-02-11 01:15:01,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:01,149 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 2139 transitions. [2022-02-11 01:15:01,149 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) [2022-02-11 01:15:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2139 transitions. [2022-02-11 01:15:01,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:15:01,151 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:01,151 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:01,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:01,370 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 [2022-02-11 01:15:01,371 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:01,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:01,371 INFO L85 PathProgramCache]: Analyzing trace with hash -198928785, now seen corresponding path program 32 times [2022-02-11 01:15:01,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:01,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122645452] [2022-02-11 01:15:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:01,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:01,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:01,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122645452] [2022-02-11 01:15:01,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122645452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:01,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200556191] [2022-02-11 01:15:01,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:15:01,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:01,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:01,562 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) [2022-02-11 01:15:01,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 01:15:01,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:15:01,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:01,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 01:15:01,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:02,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:03,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200556191] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:03,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:03,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-02-11 01:15:03,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306951416] [2022-02-11 01:15:03,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:03,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 01:15:03,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:03,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 01:15:03,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:15:03,133 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) [2022-02-11 01:15:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:08,422 INFO L93 Difference]: Finished difference Result 1851 states and 3994 transitions. [2022-02-11 01:15:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-11 01:15:08,423 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 [2022-02-11 01:15:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:08,427 INFO L225 Difference]: With dead ends: 1851 [2022-02-11 01:15:08,428 INFO L226 Difference]: Without dead ends: 1783 [2022-02-11 01:15:08,429 INFO L933 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 [2022-02-11 01:15:08,429 INFO L934 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 [2022-02-11 01:15:08,429 INFO L935 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] [2022-02-11 01:15:08,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-02-11 01:15:08,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1050. [2022-02-11 01:15:08,445 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) [2022-02-11 01:15:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2417 transitions. [2022-02-11 01:15:08,447 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2417 transitions. Word has length 27 [2022-02-11 01:15:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:08,448 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 2417 transitions. [2022-02-11 01:15:08,448 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) [2022-02-11 01:15:08,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2417 transitions. [2022-02-11 01:15:08,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:15:08,449 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:08,449 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:08,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:08,657 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 [2022-02-11 01:15:08,658 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:08,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1880365043, now seen corresponding path program 33 times [2022-02-11 01:15:08,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:08,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851938924] [2022-02-11 01:15:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:08,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:08,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:08,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851938924] [2022-02-11 01:15:08,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851938924] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:08,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77488937] [2022-02-11 01:15:08,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:15:08,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:08,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:08,852 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) [2022-02-11 01:15:08,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 01:15:08,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:15:08,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:08,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 01:15:08,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:09,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:10,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77488937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:10,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:10,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-02-11 01:15:10,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668621818] [2022-02-11 01:15:10,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:10,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 01:15:10,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:10,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 01:15:10,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:15:10,102 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) [2022-02-11 01:15:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:15,597 INFO L93 Difference]: Finished difference Result 1673 states and 3668 transitions. [2022-02-11 01:15:15,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-11 01:15:15,598 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 [2022-02-11 01:15:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:15,601 INFO L225 Difference]: With dead ends: 1673 [2022-02-11 01:15:15,601 INFO L226 Difference]: Without dead ends: 1653 [2022-02-11 01:15:15,603 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6663 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3318, Invalid=15864, Unknown=0, NotChecked=0, Total=19182 [2022-02-11 01:15:15,603 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 491 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:15,603 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 369 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 01:15:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-02-11 01:15:15,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1055. [2022-02-11 01:15:15,621 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) [2022-02-11 01:15:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2427 transitions. [2022-02-11 01:15:15,623 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2427 transitions. Word has length 27 [2022-02-11 01:15:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:15,623 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 2427 transitions. [2022-02-11 01:15:15,623 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) [2022-02-11 01:15:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2427 transitions. [2022-02-11 01:15:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:15:15,624 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:15,624 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:15,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-11 01:15:15,825 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 [2022-02-11 01:15:15,825 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:15,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1651423031, now seen corresponding path program 34 times [2022-02-11 01:15:15,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:15,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920001846] [2022-02-11 01:15:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:15,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:16,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:16,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920001846] [2022-02-11 01:15:16,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920001846] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:16,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998233674] [2022-02-11 01:15:16,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:15:16,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:16,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:16,012 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) [2022-02-11 01:15:16,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 01:15:16,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:15:16,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:16,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-11 01:15:16,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:16,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:17,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998233674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:17,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:17,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 41 [2022-02-11 01:15:17,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210609140] [2022-02-11 01:15:17,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:17,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-11 01:15:17,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-11 01:15:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:15:17,522 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) [2022-02-11 01:15:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:22,522 INFO L93 Difference]: Finished difference Result 1976 states and 4378 transitions. [2022-02-11 01:15:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-11 01:15:22,522 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 [2022-02-11 01:15:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:22,526 INFO L225 Difference]: With dead ends: 1976 [2022-02-11 01:15:22,526 INFO L226 Difference]: Without dead ends: 1956 [2022-02-11 01:15:22,526 INFO L933 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 [2022-02-11 01:15:22,527 INFO L934 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:22,527 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 402 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 01:15:22,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-02-11 01:15:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1050. [2022-02-11 01:15:22,546 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) [2022-02-11 01:15:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2409 transitions. [2022-02-11 01:15:22,548 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2409 transitions. Word has length 27 [2022-02-11 01:15:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:22,549 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 2409 transitions. [2022-02-11 01:15:22,549 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) [2022-02-11 01:15:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2409 transitions. [2022-02-11 01:15:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:15:22,550 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:22,551 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:22,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:22,759 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 [2022-02-11 01:15:22,759 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1716949619, now seen corresponding path program 35 times [2022-02-11 01:15:22,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:22,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955297158] [2022-02-11 01:15:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:22,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:23,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:23,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955297158] [2022-02-11 01:15:23,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955297158] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:23,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659626825] [2022-02-11 01:15:23,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:15:23,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:23,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:23,004 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) [2022-02-11 01:15:23,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 01:15:23,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:15:23,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:15:23,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:23,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:24,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659626825] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:24,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:24,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-02-11 01:15:24,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722157292] [2022-02-11 01:15:24,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:24,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-11 01:15:24,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:24,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-11 01:15:24,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:15:24,413 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) [2022-02-11 01:15:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:28,938 INFO L93 Difference]: Finished difference Result 1991 states and 4278 transitions. [2022-02-11 01:15:28,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-11 01:15:28,938 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 [2022-02-11 01:15:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:28,941 INFO L225 Difference]: With dead ends: 1991 [2022-02-11 01:15:28,941 INFO L226 Difference]: Without dead ends: 1916 [2022-02-11 01:15:28,942 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4434 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2234, Invalid=10198, Unknown=0, NotChecked=0, Total=12432 [2022-02-11 01:15:28,942 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 488 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:28,942 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 482 Invalid, 2225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2023 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:15:28,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2022-02-11 01:15:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1300. [2022-02-11 01:15:28,957 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) [2022-02-11 01:15:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3002 transitions. [2022-02-11 01:15:28,959 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3002 transitions. Word has length 27 [2022-02-11 01:15:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:28,959 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 3002 transitions. [2022-02-11 01:15:28,959 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) [2022-02-11 01:15:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3002 transitions. [2022-02-11 01:15:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:15:28,961 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:28,961 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:28,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:29,161 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 [2022-02-11 01:15:29,162 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:29,162 INFO L85 PathProgramCache]: Analyzing trace with hash 36452979, now seen corresponding path program 36 times [2022-02-11 01:15:29,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:29,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719363395] [2022-02-11 01:15:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:29,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:29,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:29,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719363395] [2022-02-11 01:15:29,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719363395] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:29,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128282611] [2022-02-11 01:15:29,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:15:29,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:29,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:29,428 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) [2022-02-11 01:15:29,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 01:15:29,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:15:29,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:29,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:15:29,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:30,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:30,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128282611] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:30,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:30,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-02-11 01:15:30,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587242114] [2022-02-11 01:15:30,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:30,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-11 01:15:30,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:30,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-11 01:15:30,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:15:30,962 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) [2022-02-11 01:15:36,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:36,364 INFO L93 Difference]: Finished difference Result 2024 states and 4411 transitions. [2022-02-11 01:15:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-11 01:15:36,364 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 [2022-02-11 01:15:36,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:36,371 INFO L225 Difference]: With dead ends: 2024 [2022-02-11 01:15:36,371 INFO L226 Difference]: Without dead ends: 1956 [2022-02-11 01:15:36,372 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6231 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2873, Invalid=14683, Unknown=0, NotChecked=0, Total=17556 [2022-02-11 01:15:36,372 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 583 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:36,377 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 469 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 01:15:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-02-11 01:15:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1238. [2022-02-11 01:15:36,400 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) [2022-02-11 01:15:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2870 transitions. [2022-02-11 01:15:36,403 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2870 transitions. Word has length 27 [2022-02-11 01:15:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:36,403 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 2870 transitions. [2022-02-11 01:15:36,403 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) [2022-02-11 01:15:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2870 transitions. [2022-02-11 01:15:36,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:15:36,405 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:36,405 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:36,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-11 01:15:36,619 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 [2022-02-11 01:15:36,620 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:36,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1733026419, now seen corresponding path program 37 times [2022-02-11 01:15:36,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:36,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386595200] [2022-02-11 01:15:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:36,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:36,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:36,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386595200] [2022-02-11 01:15:36,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386595200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:36,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673664188] [2022-02-11 01:15:36,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:15:36,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:36,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:36,899 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) [2022-02-11 01:15:36,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 01:15:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:36,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:15:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:37,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:38,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673664188] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:38,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:38,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 40 [2022-02-11 01:15:38,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928280604] [2022-02-11 01:15:38,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:38,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 01:15:38,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 01:15:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:15:38,159 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) [2022-02-11 01:15:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:43,430 INFO L93 Difference]: Finished difference Result 2027 states and 4488 transitions. [2022-02-11 01:15:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-11 01:15:43,435 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 [2022-02-11 01:15:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:43,439 INFO L225 Difference]: With dead ends: 2027 [2022-02-11 01:15:43,440 INFO L226 Difference]: Without dead ends: 1956 [2022-02-11 01:15:43,441 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7003 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3164, Invalid=16576, Unknown=0, NotChecked=0, Total=19740 [2022-02-11 01:15:43,441 INFO L934 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:43,442 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 376 Invalid, 2490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:15:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-02-11 01:15:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1210. [2022-02-11 01:15:43,464 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) [2022-02-11 01:15:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 2795 transitions. [2022-02-11 01:15:43,466 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 2795 transitions. Word has length 27 [2022-02-11 01:15:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:43,467 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 2795 transitions. [2022-02-11 01:15:43,467 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) [2022-02-11 01:15:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 2795 transitions. [2022-02-11 01:15:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:15:43,469 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:43,469 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:43,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:43,683 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 [2022-02-11 01:15:43,683 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:43,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:43,684 INFO L85 PathProgramCache]: Analyzing trace with hash 989532139, now seen corresponding path program 38 times [2022-02-11 01:15:43,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:43,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872730983] [2022-02-11 01:15:43,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:43,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:43,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:43,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872730983] [2022-02-11 01:15:43,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872730983] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:43,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030999483] [2022-02-11 01:15:43,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:15:43,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:43,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:43,914 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) [2022-02-11 01:15:43,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 01:15:43,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:15:43,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:15:43,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:44,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:45,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030999483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:45,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:45,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-02-11 01:15:45,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96986681] [2022-02-11 01:15:45,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:45,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-11 01:15:45,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-11 01:15:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 01:15:45,174 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) [2022-02-11 01:15:48,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:48,526 INFO L93 Difference]: Finished difference Result 1819 states and 4016 transitions. [2022-02-11 01:15:48,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-11 01:15:48,526 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 [2022-02-11 01:15:48,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:48,529 INFO L225 Difference]: With dead ends: 1819 [2022-02-11 01:15:48,529 INFO L226 Difference]: Without dead ends: 1761 [2022-02-11 01:15:48,530 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1688, Invalid=6868, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 01:15:48,530 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 406 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:48,530 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 413 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:15:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-02-11 01:15:48,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1251. [2022-02-11 01:15:48,551 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) [2022-02-11 01:15:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 2889 transitions. [2022-02-11 01:15:48,553 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 2889 transitions. Word has length 27 [2022-02-11 01:15:48,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:48,553 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 2889 transitions. [2022-02-11 01:15:48,554 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) [2022-02-11 01:15:48,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 2889 transitions. [2022-02-11 01:15:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:15:48,555 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:48,555 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:48,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:48,755 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 [2022-02-11 01:15:48,756 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:48,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:48,756 INFO L85 PathProgramCache]: Analyzing trace with hash -342558545, now seen corresponding path program 39 times [2022-02-11 01:15:48,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:48,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233973314] [2022-02-11 01:15:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:48,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:48,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:48,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233973314] [2022-02-11 01:15:48,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233973314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:48,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728758509] [2022-02-11 01:15:48,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:15:48,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:48,944 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) [2022-02-11 01:15:48,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 01:15:48,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:15:48,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:48,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-11 01:15:48,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:49,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:50,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728758509] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:50,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:50,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-02-11 01:15:50,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474620680] [2022-02-11 01:15:50,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:50,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-11 01:15:50,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:50,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-11 01:15:50,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 01:15:50,183 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) [2022-02-11 01:15:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:55,428 INFO L93 Difference]: Finished difference Result 2034 states and 4490 transitions. [2022-02-11 01:15:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-11 01:15:55,428 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 [2022-02-11 01:15:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:55,434 INFO L225 Difference]: With dead ends: 2034 [2022-02-11 01:15:55,434 INFO L226 Difference]: Without dead ends: 1966 [2022-02-11 01:15:55,435 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5137 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2605, Invalid=12401, Unknown=0, NotChecked=0, Total=15006 [2022-02-11 01:15:55,436 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 399 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:55,436 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 300 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 01:15:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-02-11 01:15:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1192. [2022-02-11 01:15:55,457 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) [2022-02-11 01:15:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2753 transitions. [2022-02-11 01:15:55,465 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2753 transitions. Word has length 27 [2022-02-11 01:15:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:55,465 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 2753 transitions. [2022-02-11 01:15:55,465 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) [2022-02-11 01:15:55,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2753 transitions. [2022-02-11 01:15:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:15:55,467 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:55,467 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:55,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:55,687 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 [2022-02-11 01:15:55,687 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:55,688 INFO L85 PathProgramCache]: Analyzing trace with hash 56938553, now seen corresponding path program 40 times [2022-02-11 01:15:55,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:55,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933340060] [2022-02-11 01:15:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:55,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-11 01:15:55,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:55,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933340060] [2022-02-11 01:15:55,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933340060] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:55,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755027569] [2022-02-11 01:15:55,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:15:55,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:55,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:55,858 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) [2022-02-11 01:15:55,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 01:15:55,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:15:55,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:55,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:15:55,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:56,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:57,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755027569] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:57,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:57,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 16] total 43 [2022-02-11 01:15:57,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473299096] [2022-02-11 01:15:57,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:57,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-11 01:15:57,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:57,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-11 01:15:57,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:15:57,431 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) [2022-02-11 01:16:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:00,759 INFO L93 Difference]: Finished difference Result 2673 states and 6185 transitions. [2022-02-11 01:16:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 01:16:00,759 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 [2022-02-11 01:16:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:00,762 INFO L225 Difference]: With dead ends: 2673 [2022-02-11 01:16:00,762 INFO L226 Difference]: Without dead ends: 2542 [2022-02-11 01:16:00,763 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1411, Invalid=7145, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 01:16:00,763 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 295 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:00,763 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 230 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:16:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2022-02-11 01:16:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 595. [2022-02-11 01:16:00,777 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) [2022-02-11 01:16:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1208 transitions. [2022-02-11 01:16:00,778 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1208 transitions. Word has length 29 [2022-02-11 01:16:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:00,778 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1208 transitions. [2022-02-11 01:16:00,778 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) [2022-02-11 01:16:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1208 transitions. [2022-02-11 01:16:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:16:00,779 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:00,779 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:00,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:00,979 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 [2022-02-11 01:16:00,980 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:00,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1849159349, now seen corresponding path program 41 times [2022-02-11 01:16:00,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:00,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373102624] [2022-02-11 01:16:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 01:16:01,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:01,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373102624] [2022-02-11 01:16:01,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373102624] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:01,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230509619] [2022-02-11 01:16:01,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:16:01,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:01,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:01,194 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) [2022-02-11 01:16:01,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 01:16:01,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:16:01,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:01,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:16:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:02,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:02,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230509619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:02,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:02,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 16] total 43 [2022-02-11 01:16:02,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96570569] [2022-02-11 01:16:02,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:02,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-11 01:16:02,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:02,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-11 01:16:02,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:16:02,803 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) [2022-02-11 01:16:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:05,713 INFO L93 Difference]: Finished difference Result 908 states and 1838 transitions. [2022-02-11 01:16:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 01:16:05,713 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 [2022-02-11 01:16:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:05,714 INFO L225 Difference]: With dead ends: 908 [2022-02-11 01:16:05,714 INFO L226 Difference]: Without dead ends: 883 [2022-02-11 01:16:05,715 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1393, Invalid=7537, Unknown=0, NotChecked=0, Total=8930 [2022-02-11 01:16:05,715 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 290 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:05,716 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 121 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:16:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-02-11 01:16:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 589. [2022-02-11 01:16:05,722 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) [2022-02-11 01:16:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1179 transitions. [2022-02-11 01:16:05,723 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1179 transitions. Word has length 29 [2022-02-11 01:16:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:05,723 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 1179 transitions. [2022-02-11 01:16:05,723 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) [2022-02-11 01:16:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1179 transitions. [2022-02-11 01:16:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:16:05,724 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:05,724 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:05,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-11 01:16:05,925 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 [2022-02-11 01:16:05,925 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1727060569, now seen corresponding path program 42 times [2022-02-11 01:16:05,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:05,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964153470] [2022-02-11 01:16:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:05,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:06,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:06,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964153470] [2022-02-11 01:16:06,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964153470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:06,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234116112] [2022-02-11 01:16:06,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:16:06,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:06,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:06,154 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) [2022-02-11 01:16:06,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 01:16:06,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:16:06,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 01:16:06,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:06,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:08,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234116112] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:08,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:08,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-02-11 01:16:08,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337103617] [2022-02-11 01:16:08,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:08,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-11 01:16:08,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:08,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-11 01:16:08,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1502, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:16:08,459 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) [2022-02-11 01:16:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:14,829 INFO L93 Difference]: Finished difference Result 1179 states and 2345 transitions. [2022-02-11 01:16:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-11 01:16:14,830 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 [2022-02-11 01:16:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:14,831 INFO L225 Difference]: With dead ends: 1179 [2022-02-11 01:16:14,831 INFO L226 Difference]: Without dead ends: 1136 [2022-02-11 01:16:14,832 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3128 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1522, Invalid=8578, Unknown=0, NotChecked=0, Total=10100 [2022-02-11 01:16:14,832 INFO L934 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:14,832 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 98 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 01:16:14,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-02-11 01:16:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 759. [2022-02-11 01:16:14,842 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) [2022-02-11 01:16:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1518 transitions. [2022-02-11 01:16:14,843 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1518 transitions. Word has length 29 [2022-02-11 01:16:14,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:14,843 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1518 transitions. [2022-02-11 01:16:14,844 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) [2022-02-11 01:16:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1518 transitions. [2022-02-11 01:16:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:16:14,845 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:14,845 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:14,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:15,060 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 [2022-02-11 01:16:15,060 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:15,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1863336609, now seen corresponding path program 43 times [2022-02-11 01:16:15,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:15,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153440749] [2022-02-11 01:16:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:15,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:15,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:15,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153440749] [2022-02-11 01:16:15,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153440749] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:15,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428921193] [2022-02-11 01:16:15,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:16:15,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:15,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:15,366 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) [2022-02-11 01:16:15,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 01:16:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:15,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 01:16:15,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:16,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:17,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428921193] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:17,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:17,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-02-11 01:16:17,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802499114] [2022-02-11 01:16:17,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:17,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-11 01:16:17,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:17,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-11 01:16:17,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:16:17,671 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) [2022-02-11 01:16:25,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:25,778 INFO L93 Difference]: Finished difference Result 1815 states and 3619 transitions. [2022-02-11 01:16:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-11 01:16:25,782 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 [2022-02-11 01:16:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:25,785 INFO L225 Difference]: With dead ends: 1815 [2022-02-11 01:16:25,785 INFO L226 Difference]: Without dead ends: 1769 [2022-02-11 01:16:25,785 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3913 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1903, Invalid=10307, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 01:16:25,786 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 249 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:25,786 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 107 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:16:25,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-02-11 01:16:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1016. [2022-02-11 01:16:25,798 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) [2022-02-11 01:16:25,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2031 transitions. [2022-02-11 01:16:25,799 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2031 transitions. Word has length 29 [2022-02-11 01:16:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:25,800 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 2031 transitions. [2022-02-11 01:16:25,800 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) [2022-02-11 01:16:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2031 transitions. [2022-02-11 01:16:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:16:25,801 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:25,801 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:25,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:26,001 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 [2022-02-11 01:16:26,002 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:26,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1925315549, now seen corresponding path program 44 times [2022-02-11 01:16:26,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:26,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076376306] [2022-02-11 01:16:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:26,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:26,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:26,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076376306] [2022-02-11 01:16:26,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076376306] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:26,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982799226] [2022-02-11 01:16:26,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:16:26,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:26,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:26,232 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) [2022-02-11 01:16:26,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 01:16:26,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:16:26,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:16:26,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:26,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:28,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982799226] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:28,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:28,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-02-11 01:16:28,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761978504] [2022-02-11 01:16:28,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:28,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-11 01:16:28,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:28,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-11 01:16:28,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:16:28,333 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) [2022-02-11 01:16:34,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:34,958 INFO L93 Difference]: Finished difference Result 2259 states and 4514 transitions. [2022-02-11 01:16:34,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-11 01:16:34,958 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 [2022-02-11 01:16:34,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:34,961 INFO L225 Difference]: With dead ends: 2259 [2022-02-11 01:16:34,961 INFO L226 Difference]: Without dead ends: 2223 [2022-02-11 01:16:34,962 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2498, Invalid=13252, Unknown=0, NotChecked=0, Total=15750 [2022-02-11 01:16:34,964 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 278 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:34,964 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 135 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1812 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:16:34,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2022-02-11 01:16:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1208. [2022-02-11 01:16:35,013 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) [2022-02-11 01:16:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2418 transitions. [2022-02-11 01:16:35,015 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2418 transitions. Word has length 29 [2022-02-11 01:16:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:35,016 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 2418 transitions. [2022-02-11 01:16:35,016 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) [2022-02-11 01:16:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2418 transitions. [2022-02-11 01:16:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:16:35,018 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:35,018 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:35,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:35,255 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 [2022-02-11 01:16:35,255 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:35,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:35,256 INFO L85 PathProgramCache]: Analyzing trace with hash 849604393, now seen corresponding path program 45 times [2022-02-11 01:16:35,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:35,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156262054] [2022-02-11 01:16:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:35,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:35,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:35,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156262054] [2022-02-11 01:16:35,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156262054] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:35,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982483497] [2022-02-11 01:16:35,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:16:35,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:35,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:35,664 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) [2022-02-11 01:16:35,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 01:16:35,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 01:16:35,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:35,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:16:35,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:36,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:38,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982483497] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:38,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:38,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-02-11 01:16:38,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269392228] [2022-02-11 01:16:38,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:38,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-11 01:16:38,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:38,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-11 01:16:38,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:16:38,125 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) [2022-02-11 01:16:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:44,054 INFO L93 Difference]: Finished difference Result 2363 states and 4723 transitions. [2022-02-11 01:16:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-11 01:16:44,054 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 [2022-02-11 01:16:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:44,058 INFO L225 Difference]: With dead ends: 2363 [2022-02-11 01:16:44,058 INFO L226 Difference]: Without dead ends: 2333 [2022-02-11 01:16:44,059 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4580 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2095, Invalid=11015, Unknown=0, NotChecked=0, Total=13110 [2022-02-11 01:16:44,060 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 278 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:44,060 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 168 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 01:16:44,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-02-11 01:16:44,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1213. [2022-02-11 01:16:44,081 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) [2022-02-11 01:16:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2429 transitions. [2022-02-11 01:16:44,083 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2429 transitions. Word has length 29 [2022-02-11 01:16:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:44,084 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 2429 transitions. [2022-02-11 01:16:44,084 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) [2022-02-11 01:16:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2429 transitions. [2022-02-11 01:16:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:16:44,086 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:44,086 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:44,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:44,307 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 [2022-02-11 01:16:44,308 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:44,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:44,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2097362907, now seen corresponding path program 46 times [2022-02-11 01:16:44,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:44,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329530090] [2022-02-11 01:16:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:44,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:16:44,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:44,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329530090] [2022-02-11 01:16:44,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329530090] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:44,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389580127] [2022-02-11 01:16:44,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:16:44,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:44,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:44,580 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) [2022-02-11 01:16:44,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 01:16:44,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:16:44,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:44,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:16:44,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:45,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:46,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389580127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:46,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:46,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-02-11 01:16:46,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687350625] [2022-02-11 01:16:46,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:46,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-11 01:16:46,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:46,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-11 01:16:46,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:16:46,588 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) [2022-02-11 01:16:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:51,925 INFO L93 Difference]: Finished difference Result 2885 states and 5768 transitions. [2022-02-11 01:16:51,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-11 01:16:51,925 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 [2022-02-11 01:16:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:51,929 INFO L225 Difference]: With dead ends: 2885 [2022-02-11 01:16:51,929 INFO L226 Difference]: Without dead ends: 2834 [2022-02-11 01:16:51,930 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4093 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1895, Invalid=10315, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 01:16:51,931 INFO L934 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 [2022-02-11 01:16:51,931 INFO L935 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] [2022-02-11 01:16:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-02-11 01:16:51,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1824. [2022-02-11 01:16:51,953 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) [2022-02-11 01:16:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3664 transitions. [2022-02-11 01:16:51,955 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3664 transitions. Word has length 29 [2022-02-11 01:16:51,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:51,955 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 3664 transitions. [2022-02-11 01:16:51,955 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) [2022-02-11 01:16:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3664 transitions. [2022-02-11 01:16:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:16:51,957 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:51,957 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:51,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:52,158 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 [2022-02-11 01:16:52,158 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash 110491549, now seen corresponding path program 47 times [2022-02-11 01:16:52,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:52,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266166810] [2022-02-11 01:16:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:52,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:52,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:52,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266166810] [2022-02-11 01:16:52,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266166810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:52,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237510700] [2022-02-11 01:16:52,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:16:52,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:52,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:52,363 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) [2022-02-11 01:16:52,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 01:16:52,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:16:52,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 01:16:52,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:52,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:54,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237510700] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:54,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:54,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2022-02-11 01:16:54,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579544062] [2022-02-11 01:16:54,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:54,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-11 01:16:54,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:54,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-11 01:16:54,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 01:16:54,484 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) [2022-02-11 01:16:58,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:58,227 INFO L93 Difference]: Finished difference Result 3116 states and 6260 transitions. [2022-02-11 01:16:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 01:16:58,227 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 [2022-02-11 01:16:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:58,230 INFO L225 Difference]: With dead ends: 3116 [2022-02-11 01:16:58,230 INFO L226 Difference]: Without dead ends: 3065 [2022-02-11 01:16:58,231 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1379, Invalid=7933, Unknown=0, NotChecked=0, Total=9312 [2022-02-11 01:16:58,231 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 242 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:58,231 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 192 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:16:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-02-11 01:16:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 1021. [2022-02-11 01:16:58,254 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) [2022-02-11 01:16:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2036 transitions. [2022-02-11 01:16:58,256 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2036 transitions. Word has length 29 [2022-02-11 01:16:58,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:58,256 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 2036 transitions. [2022-02-11 01:16:58,256 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) [2022-02-11 01:16:58,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2036 transitions. [2022-02-11 01:16:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 01:16:58,258 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:58,258 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:58,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:58,471 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 [2022-02-11 01:16:58,471 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1219843941, now seen corresponding path program 48 times [2022-02-11 01:16:58,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:58,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985032778] [2022-02-11 01:16:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:58,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:58,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:58,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985032778] [2022-02-11 01:16:58,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985032778] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:58,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410845346] [2022-02-11 01:16:58,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:16:58,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:58,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:58,691 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) [2022-02-11 01:16:58,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 01:16:58,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:16:58,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:58,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 01:16:58,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:16:59,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:17:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:17:00,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410845346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:17:00,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:17:00,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-02-11 01:17:00,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925839108] [2022-02-11 01:17:00,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:17:00,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-11 01:17:00,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:17:00,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-11 01:17:00,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:17:00,776 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) [2022-02-11 01:17:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:17:03,403 INFO L93 Difference]: Finished difference Result 1676 states and 3347 transitions. [2022-02-11 01:17:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 01:17:03,404 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 [2022-02-11 01:17:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:17:03,404 INFO L225 Difference]: With dead ends: 1676 [2022-02-11 01:17:03,404 INFO L226 Difference]: Without dead ends: 0 [2022-02-11 01:17:03,404 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1156, Invalid=6500, Unknown=0, NotChecked=0, Total=7656 [2022-02-11 01:17:03,405 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 254 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:17:03,405 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 118 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 01:17:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-11 01:17:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-11 01:17:03,405 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) [2022-02-11 01:17:03,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-11 01:17:03,405 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-02-11 01:17:03,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:17:03,405 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-11 01:17:03,405 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) [2022-02-11 01:17:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-11 01:17:03,406 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-11 01:17:03,408 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-11 01:17:03,408 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-11 01:17:03,408 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-11 01:17:03,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-11 01:17:03,615 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 [2022-02-11 01:17:03,618 INFO L733 BasicCegarLoop]: Path program histogram: [48, 1, 1] [2022-02-11 01:17:03,620 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 01:17:03,620 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 01:17:03,622 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 01:17:03 BasicIcfg [2022-02-11 01:17:03,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 01:17:03,622 INFO L158 Benchmark]: Toolchain (without parser) took 289794.05ms. Allocated memory was 177.2MB in the beginning and 295.7MB in the end (delta: 118.5MB). Free memory was 133.3MB in the beginning and 150.6MB in the end (delta: -17.3MB). Peak memory consumption was 102.2MB. Max. memory is 8.0GB. [2022-02-11 01:17:03,622 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 177.2MB. Free memory is still 134.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 01:17:03,622 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.72ms. Allocated memory is still 177.2MB. Free memory was 133.3MB in the beginning and 131.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:17:03,622 INFO L158 Benchmark]: Boogie Preprocessor took 16.22ms. Allocated memory is still 177.2MB. Free memory was 131.8MB in the beginning and 130.8MB in the end (delta: 926.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:17:03,623 INFO L158 Benchmark]: RCFGBuilder took 231.26ms. Allocated memory is still 177.2MB. Free memory was 130.7MB in the beginning and 121.6MB in the end (delta: 9.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-11 01:17:03,623 INFO L158 Benchmark]: TraceAbstraction took 289516.39ms. Allocated memory was 177.2MB in the beginning and 295.7MB in the end (delta: 118.5MB). Free memory was 121.2MB in the beginning and 150.6MB in the end (delta: -29.4MB). Peak memory consumption was 90.7MB. Max. memory is 8.0GB. [2022-02-11 01:17:03,624 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 0.14ms. Allocated memory is still 177.2MB. Free memory is still 134.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.72ms. Allocated memory is still 177.2MB. Free memory was 133.3MB in the beginning and 131.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.22ms. Allocated memory is still 177.2MB. Free memory was 131.8MB in the beginning and 130.8MB in the end (delta: 926.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 231.26ms. Allocated memory is still 177.2MB. Free memory was 130.7MB in the beginning and 121.6MB in the end (delta: 9.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 289516.39ms. Allocated memory was 177.2MB in the beginning and 295.7MB in the end (delta: 118.5MB). Free memory was 121.2MB in the beginning and 150.6MB in the end (delta: -29.4MB). Peak memory consumption was 90.7MB. 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: 289.4s, OverallIterations: 50, TraceHistogramMax: 4, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.1s, AutomataDifference: 199.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19404 SdHoareTripleChecker+Valid, 34.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19404 mSDsluCounter, 11858 SdHoareTripleChecker+Invalid, 29.3s 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, 195.1s 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: 0.8s AutomataMinimizationTime, 50 MinimizatonAttempts, 24455 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 77.2s 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! [2022-02-11 01:17:03,667 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...