/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/MirabelleConcurrentIncrement.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-820ea7a [2022-02-18 15:51:39,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-18 15:51:39,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-18 15:51:39,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-18 15:51:39,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-18 15:51:39,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-18 15:51:39,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-18 15:51:39,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-18 15:51:39,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-18 15:51:39,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-18 15:51:39,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-18 15:51:39,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-18 15:51:39,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-18 15:51:39,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-18 15:51:39,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-18 15:51:39,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-18 15:51:39,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-18 15:51:39,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-18 15:51:39,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-18 15:51:39,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-18 15:51:39,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-18 15:51:39,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-18 15:51:39,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-18 15:51:39,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-18 15:51:39,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-18 15:51:39,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-18 15:51:39,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-18 15:51:39,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-18 15:51:39,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-18 15:51:39,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-18 15:51:39,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-18 15:51:39,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-18 15:51:39,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-18 15:51:39,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-18 15:51:39,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-18 15:51:39,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-18 15:51:39,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-18 15:51:39,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-18 15:51:39,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-18 15:51:39,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-18 15:51:39,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-18 15:51:39,435 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 [2022-02-18 15:51:39,454 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-18 15:51:39,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-18 15:51:39,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-18 15:51:39,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-18 15:51:39,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-18 15:51:39,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-18 15:51:39,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-18 15:51:39,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-18 15:51:39,458 INFO L138 SettingsManager]: * Use SBE=true [2022-02-18 15:51:39,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-18 15:51:39,459 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-18 15:51:39,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-18 15:51:39,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-18 15:51:39,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-18 15:51:39,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-18 15:51:39,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-18 15:51:39,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-18 15:51:39,460 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-18 15:51:39,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-18 15:51:39,460 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-18 15:51:39,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-18 15:51:39,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-18 15:51:39,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-18 15:51:39,460 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-18 15:51:39,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-18 15:51:39,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-18 15:51:39,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-18 15:51:39,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-18 15:51:39,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-18 15:51:39,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-18 15:51:39,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-18 15:51:39,462 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-18 15:51:39,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-18 15:51:39,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-18 15:51:39,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-18 15:51:39,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-18 15:51:39,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-18 15:51:39,678 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-18 15:51:39,682 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-18 15:51:39,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl [2022-02-18 15:51:39,683 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl' [2022-02-18 15:51:39,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-18 15:51:39,713 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-18 15:51:39,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-18 15:51:39,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-18 15:51:39,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-18 15:51:39,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 03:51:39" (1/1) ... [2022-02-18 15:51:39,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 03:51:39" (1/1) ... [2022-02-18 15:51:39,739 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-18 15:51:39,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-18 15:51:39,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-18 15:51:39,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-18 15:51:39,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-18 15:51:39,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 03:51:39" (1/1) ... [2022-02-18 15:51:39,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 03:51:39" (1/1) ... [2022-02-18 15:51:39,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 03:51:39" (1/1) ... [2022-02-18 15:51:39,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 03:51:39" (1/1) ... [2022-02-18 15:51:39,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 03:51:39" (1/1) ... [2022-02-18 15:51:39,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 03:51:39" (1/1) ... [2022-02-18 15:51:39,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 03:51:39" (1/1) ... [2022-02-18 15:51:39,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-18 15:51:39,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-18 15:51:39,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-18 15:51:39,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-18 15:51:39,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 03:51:39" (1/1) ... [2022-02-18 15:51:39,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-18 15:51:39,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:39,786 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) [2022-02-18 15:51:39,791 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 [2022-02-18 15:51:39,833 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-18 15:51:39,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-18 15:51:39,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-18 15:51:39,833 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T1 given in one single declaration [2022-02-18 15:51:39,834 INFO L130 BoogieDeclarations]: Found specification of procedure T1 [2022-02-18 15:51:39,834 INFO L138 BoogieDeclarations]: Found implementation of procedure T1 [2022-02-18 15:51:39,834 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T2 given in one single declaration [2022-02-18 15:51:39,834 INFO L130 BoogieDeclarations]: Found specification of procedure T2 [2022-02-18 15:51:39,834 INFO L138 BoogieDeclarations]: Found implementation of procedure T2 [2022-02-18 15:51:39,834 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-18 15:51:39,863 INFO L234 CfgBuilder]: Building ICFG [2022-02-18 15:51:39,864 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-18 15:51:39,916 INFO L275 CfgBuilder]: Performing block encoding [2022-02-18 15:51:39,920 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-18 15:51:39,920 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-18 15:51:39,921 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:51:39 BoogieIcfgContainer [2022-02-18 15:51:39,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-18 15:51:39,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-18 15:51:39,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-18 15:51:39,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-18 15:51:39,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 03:51:39" (1/2) ... [2022-02-18 15:51:39,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382beac6 and model type MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:51:39, skipping insertion in model container [2022-02-18 15:51:39,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:51:39" (2/2) ... [2022-02-18 15:51:39,926 INFO L111 eAbstractionObserver]: Analyzing ICFG MirabelleConcurrentIncrement.bpl [2022-02-18 15:51:39,930 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-18 15:51:39,930 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-18 15:51:39,930 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-18 15:51:39,930 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-18 15:51:39,962 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-02-18 15:51:39,990 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-18 15:51:39,995 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-02-18 15:51:39,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-18 15:51:40,001 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 62 flow [2022-02-18 15:51:40,019 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-18 15:51:40,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:40,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:40,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash -295835678, now seen corresponding path program 1 times [2022-02-18 15:51:40,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:40,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139110070] [2022-02-18 15:51:40,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:40,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:40,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:40,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139110070] [2022-02-18 15:51:40,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139110070] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 15:51:40,122 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 15:51:40,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-02-18 15:51:40,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147426657] [2022-02-18 15:51:40,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 15:51:40,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 15:51:40,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:40,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 15:51:40,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 15:51:40,154 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:40,234 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2022-02-18 15:51:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 15:51:40,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-02-18 15:51:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:40,249 INFO L225 Difference]: With dead ends: 61 [2022-02-18 15:51:40,249 INFO L226 Difference]: Without dead ends: 52 [2022-02-18 15:51:40,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 15:51:40,253 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:40,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:40,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-18 15:51:40,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-02-18 15:51:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2022-02-18 15:51:40,278 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 10 [2022-02-18 15:51:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:40,278 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2022-02-18 15:51:40,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2022-02-18 15:51:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-18 15:51:40,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:40,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:40,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-18 15:51:40,280 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1417289504, now seen corresponding path program 1 times [2022-02-18 15:51:40,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:40,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305421629] [2022-02-18 15:51:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:40,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:40,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:40,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305421629] [2022-02-18 15:51:40,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305421629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:40,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037664768] [2022-02-18 15:51:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:40,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:40,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:40,361 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) [2022-02-18 15:51:40,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-18 15:51:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-18 15:51:40,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:40,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:40,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037664768] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:40,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:40,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-18 15:51:40,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514441222] [2022-02-18 15:51:40,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:40,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 15:51:40,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 15:51:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-18 15:51:40,473 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:40,534 INFO L93 Difference]: Finished difference Result 78 states and 145 transitions. [2022-02-18 15:51:40,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-18 15:51:40,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-18 15:51:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:40,536 INFO L225 Difference]: With dead ends: 78 [2022-02-18 15:51:40,536 INFO L226 Difference]: Without dead ends: 78 [2022-02-18 15:51:40,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-18 15:51:40,537 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:40,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:40,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-18 15:51:40,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2022-02-18 15:51:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2022-02-18 15:51:40,543 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2022-02-18 15:51:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:40,544 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2022-02-18 15:51:40,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2022-02-18 15:51:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-18 15:51:40,545 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:40,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:40,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:40,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:40,762 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:40,763 INFO L85 PathProgramCache]: Analyzing trace with hash -860047836, now seen corresponding path program 1 times [2022-02-18 15:51:40,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:40,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481586496] [2022-02-18 15:51:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:40,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:40,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:40,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481586496] [2022-02-18 15:51:40,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481586496] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 15:51:40,806 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 15:51:40,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 15:51:40,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464470194] [2022-02-18 15:51:40,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 15:51:40,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 15:51:40,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 15:51:40,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 15:51:40,810 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:40,846 INFO L93 Difference]: Finished difference Result 51 states and 93 transitions. [2022-02-18 15:51:40,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 15:51:40,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-18 15:51:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:40,848 INFO L225 Difference]: With dead ends: 51 [2022-02-18 15:51:40,848 INFO L226 Difference]: Without dead ends: 43 [2022-02-18 15:51:40,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 15:51:40,851 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:40,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-18 15:51:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-02-18 15:51:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2022-02-18 15:51:40,859 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 12 [2022-02-18 15:51:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:40,859 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2022-02-18 15:51:40,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2022-02-18 15:51:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-18 15:51:40,860 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:40,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:40,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-18 15:51:40,861 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:40,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1158712992, now seen corresponding path program 2 times [2022-02-18 15:51:40,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:40,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222636610] [2022-02-18 15:51:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:40,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:40,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:40,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222636610] [2022-02-18 15:51:40,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222636610] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 15:51:40,918 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 15:51:40,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 15:51:40,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190560385] [2022-02-18 15:51:40,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 15:51:40,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 15:51:40,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:40,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 15:51:40,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 15:51:40,921 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:40,961 INFO L93 Difference]: Finished difference Result 48 states and 93 transitions. [2022-02-18 15:51:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 15:51:40,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-18 15:51:40,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:40,964 INFO L225 Difference]: With dead ends: 48 [2022-02-18 15:51:40,964 INFO L226 Difference]: Without dead ends: 48 [2022-02-18 15:51:40,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 15:51:40,966 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:40,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-18 15:51:40,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-02-18 15:51:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 85 transitions. [2022-02-18 15:51:40,970 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 85 transitions. Word has length 12 [2022-02-18 15:51:40,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:40,971 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 85 transitions. [2022-02-18 15:51:40,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 85 transitions. [2022-02-18 15:51:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 15:51:40,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:40,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:40,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-18 15:51:40,972 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:40,972 INFO L85 PathProgramCache]: Analyzing trace with hash 480777698, now seen corresponding path program 1 times [2022-02-18 15:51:40,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:40,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240398179] [2022-02-18 15:51:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:40,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:41,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:41,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240398179] [2022-02-18 15:51:41,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240398179] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:41,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773646508] [2022-02-18 15:51:41,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:41,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:41,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:41,032 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) [2022-02-18 15:51:41,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-18 15:51:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:41,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:41,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:41,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:41,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773646508] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:41,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:41,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-02-18 15:51:41,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041757577] [2022-02-18 15:51:41,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:41,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 15:51:41,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:41,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 15:51:41,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 15:51:41,205 INFO L87 Difference]: Start difference. First operand 44 states and 85 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:41,239 INFO L93 Difference]: Finished difference Result 107 states and 210 transitions. [2022-02-18 15:51:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 15:51:41,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 15:51:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:41,241 INFO L225 Difference]: With dead ends: 107 [2022-02-18 15:51:41,241 INFO L226 Difference]: Without dead ends: 98 [2022-02-18 15:51:41,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 15:51:41,242 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:41,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 15 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-18 15:51:41,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2022-02-18 15:51:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:41,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 146 transitions. [2022-02-18 15:51:41,248 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 146 transitions. Word has length 14 [2022-02-18 15:51:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:41,248 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 146 transitions. [2022-02-18 15:51:41,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 146 transitions. [2022-02-18 15:51:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 15:51:41,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:41,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:41,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:41,459 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 [2022-02-18 15:51:41,460 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:41,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash 110295842, now seen corresponding path program 2 times [2022-02-18 15:51:41,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:41,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333950482] [2022-02-18 15:51:41,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:41,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 15:51:41,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:41,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333950482] [2022-02-18 15:51:41,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333950482] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 15:51:41,500 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 15:51:41,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-18 15:51:41,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246937034] [2022-02-18 15:51:41,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 15:51:41,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 15:51:41,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:41,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 15:51:41,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 15:51:41,501 INFO L87 Difference]: Start difference. First operand 70 states and 146 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:41,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:41,535 INFO L93 Difference]: Finished difference Result 127 states and 259 transitions. [2022-02-18 15:51:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 15:51:41,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 15:51:41,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:41,536 INFO L225 Difference]: With dead ends: 127 [2022-02-18 15:51:41,536 INFO L226 Difference]: Without dead ends: 118 [2022-02-18 15:51:41,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 15:51:41,537 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:41,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 15 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-18 15:51:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2022-02-18 15:51:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.191011235955056) internal successors, (195), 89 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2022-02-18 15:51:41,543 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 14 [2022-02-18 15:51:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:41,543 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2022-02-18 15:51:41,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2022-02-18 15:51:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 15:51:41,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:41,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:41,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-18 15:51:41,545 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:41,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:41,545 INFO L85 PathProgramCache]: Analyzing trace with hash 523927072, now seen corresponding path program 3 times [2022-02-18 15:51:41,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:41,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87142107] [2022-02-18 15:51:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:41,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:41,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:41,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87142107] [2022-02-18 15:51:41,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87142107] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:41,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467439372] [2022-02-18 15:51:41,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 15:51:41,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:41,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:41,577 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) [2022-02-18 15:51:41,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-18 15:51:41,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 15:51:41,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-18 15:51:41,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:41,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:41,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467439372] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:41,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:41,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-18 15:51:41,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572250014] [2022-02-18 15:51:41,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:41,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-18 15:51:41,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-18 15:51:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-18 15:51:41,676 INFO L87 Difference]: Start difference. First operand 90 states and 195 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:41,778 INFO L93 Difference]: Finished difference Result 176 states and 345 transitions. [2022-02-18 15:51:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-18 15:51:41,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 15:51:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:41,780 INFO L225 Difference]: With dead ends: 176 [2022-02-18 15:51:41,780 INFO L226 Difference]: Without dead ends: 176 [2022-02-18 15:51:41,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-18 15:51:41,781 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:41,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 31 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-18 15:51:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 92. [2022-02-18 15:51:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.208791208791209) internal successors, (201), 91 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 201 transitions. [2022-02-18 15:51:41,787 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 201 transitions. Word has length 16 [2022-02-18 15:51:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:41,787 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 201 transitions. [2022-02-18 15:51:41,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 201 transitions. [2022-02-18 15:51:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 15:51:41,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:41,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:41,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:41,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:42,000 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:42,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:42,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1858903004, now seen corresponding path program 4 times [2022-02-18 15:51:42,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:42,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170605302] [2022-02-18 15:51:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:42,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:42,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:42,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170605302] [2022-02-18 15:51:42,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170605302] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:42,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405407410] [2022-02-18 15:51:42,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 15:51:42,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:42,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:42,041 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) [2022-02-18 15:51:42,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-18 15:51:42,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 15:51:42,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:42,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-18 15:51:42,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:42,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:42,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405407410] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:42,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:42,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-18 15:51:42,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179264080] [2022-02-18 15:51:42,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:42,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-18 15:51:42,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-18 15:51:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-18 15:51:42,124 INFO L87 Difference]: Start difference. First operand 92 states and 201 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:42,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:42,196 INFO L93 Difference]: Finished difference Result 161 states and 325 transitions. [2022-02-18 15:51:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-18 15:51:42,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 15:51:42,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:42,198 INFO L225 Difference]: With dead ends: 161 [2022-02-18 15:51:42,198 INFO L226 Difference]: Without dead ends: 150 [2022-02-18 15:51:42,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-18 15:51:42,198 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 80 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:42,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 15 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-18 15:51:42,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2022-02-18 15:51:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1981981981981984) internal successors, (244), 111 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2022-02-18 15:51:42,204 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 16 [2022-02-18 15:51:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:42,204 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2022-02-18 15:51:42,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2022-02-18 15:51:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 15:51:42,205 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:42,205 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:42,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:42,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:42,424 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:42,424 INFO L85 PathProgramCache]: Analyzing trace with hash 794512882, now seen corresponding path program 5 times [2022-02-18 15:51:42,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:42,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81254907] [2022-02-18 15:51:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:42,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:42,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:42,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81254907] [2022-02-18 15:51:42,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81254907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:42,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191860792] [2022-02-18 15:51:42,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 15:51:42,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:42,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:42,464 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) [2022-02-18 15:51:42,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-18 15:51:42,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 15:51:42,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:42,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-18 15:51:42,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:42,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:42,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191860792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:42,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:42,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-18 15:51:42,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871213498] [2022-02-18 15:51:42,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:42,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 15:51:42,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:42,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 15:51:42,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-18 15:51:42,544 INFO L87 Difference]: Start difference. First operand 112 states and 244 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:42,613 INFO L93 Difference]: Finished difference Result 154 states and 311 transitions. [2022-02-18 15:51:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-18 15:51:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 15:51:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:42,614 INFO L225 Difference]: With dead ends: 154 [2022-02-18 15:51:42,614 INFO L226 Difference]: Without dead ends: 154 [2022-02-18 15:51:42,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-18 15:51:42,615 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:42,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 18 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-18 15:51:42,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2022-02-18 15:51:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1743119266055047) internal successors, (237), 109 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:42,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 237 transitions. [2022-02-18 15:51:42,619 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 237 transitions. Word has length 16 [2022-02-18 15:51:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:42,620 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 237 transitions. [2022-02-18 15:51:42,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 237 transitions. [2022-02-18 15:51:42,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 15:51:42,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:42,621 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:42,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:42,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:42,836 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:42,836 INFO L85 PathProgramCache]: Analyzing trace with hash 305629652, now seen corresponding path program 6 times [2022-02-18 15:51:42,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:42,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420271275] [2022-02-18 15:51:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:42,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:42,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:42,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420271275] [2022-02-18 15:51:42,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420271275] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:42,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730457491] [2022-02-18 15:51:42,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 15:51:42,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:42,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:42,872 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) [2022-02-18 15:51:42,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-18 15:51:42,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-18 15:51:42,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:42,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-18 15:51:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:42,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:42,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730457491] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:42,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:42,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-18 15:51:42,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899614158] [2022-02-18 15:51:42,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:42,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 15:51:42,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 15:51:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-18 15:51:42,981 INFO L87 Difference]: Start difference. First operand 110 states and 237 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:43,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:43,033 INFO L93 Difference]: Finished difference Result 144 states and 290 transitions. [2022-02-18 15:51:43,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-18 15:51:43,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 15:51:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:43,034 INFO L225 Difference]: With dead ends: 144 [2022-02-18 15:51:43,034 INFO L226 Difference]: Without dead ends: 141 [2022-02-18 15:51:43,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-18 15:51:43,035 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:43,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 13 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-18 15:51:43,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2022-02-18 15:51:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2022-02-18 15:51:43,039 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 16 [2022-02-18 15:51:43,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:43,039 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2022-02-18 15:51:43,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:43,039 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2022-02-18 15:51:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 15:51:43,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:43,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:43,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:43,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:43,248 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:43,248 INFO L85 PathProgramCache]: Analyzing trace with hash 867656288, now seen corresponding path program 7 times [2022-02-18 15:51:43,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:43,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139703265] [2022-02-18 15:51:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:43,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:43,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:43,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139703265] [2022-02-18 15:51:43,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139703265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:43,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784336081] [2022-02-18 15:51:43,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 15:51:43,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:43,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:43,276 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) [2022-02-18 15:51:43,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-18 15:51:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-18 15:51:43,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:43,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:43,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784336081] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:43,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:43,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-18 15:51:43,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340840384] [2022-02-18 15:51:43,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:43,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 15:51:43,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:43,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 15:51:43,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-18 15:51:43,379 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:43,449 INFO L93 Difference]: Finished difference Result 195 states and 392 transitions. [2022-02-18 15:51:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-18 15:51:43,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 15:51:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:43,451 INFO L225 Difference]: With dead ends: 195 [2022-02-18 15:51:43,451 INFO L226 Difference]: Without dead ends: 195 [2022-02-18 15:51:43,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-18 15:51:43,452 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:43,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 17 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-02-18 15:51:43,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 122. [2022-02-18 15:51:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1983471074380163) internal successors, (266), 121 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) [2022-02-18 15:51:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 266 transitions. [2022-02-18 15:51:43,458 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 266 transitions. Word has length 16 [2022-02-18 15:51:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:43,459 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 266 transitions. [2022-02-18 15:51:43,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 266 transitions. [2022-02-18 15:51:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 15:51:43,460 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:43,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:43,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:43,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:43,676 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:43,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:43,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1409681052, now seen corresponding path program 8 times [2022-02-18 15:51:43,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:43,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886719368] [2022-02-18 15:51:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:43,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:43,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:43,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886719368] [2022-02-18 15:51:43,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886719368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:43,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427236211] [2022-02-18 15:51:43,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 15:51:43,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:43,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:43,705 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) [2022-02-18 15:51:43,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-18 15:51:43,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 15:51:43,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:43,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-18 15:51:43,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:43,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:43,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427236211] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:43,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:43,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-18 15:51:43,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150500368] [2022-02-18 15:51:43,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:43,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 15:51:43,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:43,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 15:51:43,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-18 15:51:43,779 INFO L87 Difference]: Start difference. First operand 122 states and 266 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:43,838 INFO L93 Difference]: Finished difference Result 177 states and 366 transitions. [2022-02-18 15:51:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-18 15:51:43,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 15:51:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:43,848 INFO L225 Difference]: With dead ends: 177 [2022-02-18 15:51:43,848 INFO L226 Difference]: Without dead ends: 174 [2022-02-18 15:51:43,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-18 15:51:43,849 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:43,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:43,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-18 15:51:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2022-02-18 15:51:43,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.251968503937008) internal successors, (286), 127 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 286 transitions. [2022-02-18 15:51:43,852 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 286 transitions. Word has length 16 [2022-02-18 15:51:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:43,852 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 286 transitions. [2022-02-18 15:51:43,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:43,853 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 286 transitions. [2022-02-18 15:51:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 15:51:43,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:43,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:43,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-18 15:51:44,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-18 15:51:44,071 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:44,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:44,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1755170378, now seen corresponding path program 9 times [2022-02-18 15:51:44,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:44,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771265341] [2022-02-18 15:51:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:44,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:44,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:44,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771265341] [2022-02-18 15:51:44,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771265341] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:44,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889724127] [2022-02-18 15:51:44,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 15:51:44,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:44,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:44,115 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) [2022-02-18 15:51:44,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-18 15:51:44,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 15:51:44,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:44,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-18 15:51:44,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:44,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:44,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889724127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:44,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:44,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-18 15:51:44,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675534433] [2022-02-18 15:51:44,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:44,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 15:51:44,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:44,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 15:51:44,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-18 15:51:44,180 INFO L87 Difference]: Start difference. First operand 128 states and 286 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:44,241 INFO L93 Difference]: Finished difference Result 184 states and 383 transitions. [2022-02-18 15:51:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-18 15:51:44,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 15:51:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:44,242 INFO L225 Difference]: With dead ends: 184 [2022-02-18 15:51:44,242 INFO L226 Difference]: Without dead ends: 184 [2022-02-18 15:51:44,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-18 15:51:44,243 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:44,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 24 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-18 15:51:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 130. [2022-02-18 15:51:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.248062015503876) internal successors, (290), 129 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 290 transitions. [2022-02-18 15:51:44,246 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 290 transitions. Word has length 16 [2022-02-18 15:51:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:44,246 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 290 transitions. [2022-02-18 15:51:44,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 290 transitions. [2022-02-18 15:51:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 15:51:44,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:44,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:44,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:44,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-18 15:51:44,463 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:44,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2050913688, now seen corresponding path program 10 times [2022-02-18 15:51:44,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:44,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963190101] [2022-02-18 15:51:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:44,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:44,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:44,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963190101] [2022-02-18 15:51:44,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963190101] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:44,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932719305] [2022-02-18 15:51:44,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 15:51:44,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:44,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:44,488 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) [2022-02-18 15:51:44,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-18 15:51:44,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 15:51:44,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:44,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-18 15:51:44,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:44,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:44,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932719305] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:44,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:44,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-18 15:51:44,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146364153] [2022-02-18 15:51:44,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:44,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 15:51:44,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 15:51:44,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-18 15:51:44,551 INFO L87 Difference]: Start difference. First operand 130 states and 290 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:44,603 INFO L93 Difference]: Finished difference Result 192 states and 395 transitions. [2022-02-18 15:51:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-18 15:51:44,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 15:51:44,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:44,604 INFO L225 Difference]: With dead ends: 192 [2022-02-18 15:51:44,604 INFO L226 Difference]: Without dead ends: 189 [2022-02-18 15:51:44,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-18 15:51:44,605 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:44,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 14 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:44,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-18 15:51:44,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 130. [2022-02-18 15:51:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.24031007751938) internal successors, (289), 129 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 289 transitions. [2022-02-18 15:51:44,608 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 289 transitions. Word has length 16 [2022-02-18 15:51:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:44,609 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 289 transitions. [2022-02-18 15:51:44,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:44,609 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 289 transitions. [2022-02-18 15:51:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 15:51:44,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:44,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:44,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:44,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-18 15:51:44,819 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:44,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1466711538, now seen corresponding path program 11 times [2022-02-18 15:51:44,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:44,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764089691] [2022-02-18 15:51:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:44,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:44,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:44,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764089691] [2022-02-18 15:51:44,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764089691] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:44,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431703665] [2022-02-18 15:51:44,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 15:51:44,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:44,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:44,847 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) [2022-02-18 15:51:44,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-18 15:51:44,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 15:51:44,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:44,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-18 15:51:44,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:44,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:44,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431703665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:44,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:44,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-18 15:51:44,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024258756] [2022-02-18 15:51:44,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:44,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-18 15:51:44,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:44,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-18 15:51:44,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-18 15:51:44,921 INFO L87 Difference]: Start difference. First operand 130 states and 289 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:44,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:44,994 INFO L93 Difference]: Finished difference Result 173 states and 357 transitions. [2022-02-18 15:51:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-18 15:51:44,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 15:51:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:44,995 INFO L225 Difference]: With dead ends: 173 [2022-02-18 15:51:44,995 INFO L226 Difference]: Without dead ends: 173 [2022-02-18 15:51:44,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-18 15:51:44,996 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:44,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 23 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:44,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-18 15:51:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2022-02-18 15:51:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.208) internal successors, (276), 125 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 276 transitions. [2022-02-18 15:51:44,999 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 276 transitions. Word has length 16 [2022-02-18 15:51:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:44,999 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 276 transitions. [2022-02-18 15:51:44,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 276 transitions. [2022-02-18 15:51:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 15:51:45,000 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:45,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:45,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:45,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-18 15:51:45,216 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:45,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:45,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1706198030, now seen corresponding path program 12 times [2022-02-18 15:51:45,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:45,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859941650] [2022-02-18 15:51:45,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:45,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:45,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:45,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859941650] [2022-02-18 15:51:45,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859941650] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:45,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095635640] [2022-02-18 15:51:45,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 15:51:45,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:45,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:45,242 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) [2022-02-18 15:51:45,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-18 15:51:45,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 15:51:45,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:45,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-18 15:51:45,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:45,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:45,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095635640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:45,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:45,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-18 15:51:45,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582953987] [2022-02-18 15:51:45,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:45,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-18 15:51:45,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:45,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-18 15:51:45,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-18 15:51:45,307 INFO L87 Difference]: Start difference. First operand 126 states and 276 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:45,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:45,379 INFO L93 Difference]: Finished difference Result 188 states and 378 transitions. [2022-02-18 15:51:45,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-18 15:51:45,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 15:51:45,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:45,380 INFO L225 Difference]: With dead ends: 188 [2022-02-18 15:51:45,380 INFO L226 Difference]: Without dead ends: 179 [2022-02-18 15:51:45,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-18 15:51:45,380 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 75 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:45,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 14 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:45,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-18 15:51:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 132. [2022-02-18 15:51:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2022-02-18 15:51:45,384 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 16 [2022-02-18 15:51:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:45,384 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2022-02-18 15:51:45,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2022-02-18 15:51:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 15:51:45,384 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:45,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:45,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:45,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-18 15:51:45,599 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:45,600 INFO L85 PathProgramCache]: Analyzing trace with hash 952939746, now seen corresponding path program 13 times [2022-02-18 15:51:45,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:45,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786577576] [2022-02-18 15:51:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:45,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:45,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:45,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786577576] [2022-02-18 15:51:45,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786577576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:45,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92825184] [2022-02-18 15:51:45,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 15:51:45,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:45,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:45,635 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) [2022-02-18 15:51:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-18 15:51:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:45,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-18 15:51:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:45,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:45,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92825184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:45,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:45,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-02-18 15:51:45,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253809376] [2022-02-18 15:51:45,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:45,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 15:51:45,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:45,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 15:51:45,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 15:51:45,761 INFO L87 Difference]: Start difference. First operand 132 states and 287 transitions. Second operand has 5 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) [2022-02-18 15:51:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:45,813 INFO L93 Difference]: Finished difference Result 239 states and 502 transitions. [2022-02-18 15:51:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 15:51:45,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 [2022-02-18 15:51:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:45,815 INFO L225 Difference]: With dead ends: 239 [2022-02-18 15:51:45,815 INFO L226 Difference]: Without dead ends: 230 [2022-02-18 15:51:45,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 15:51:45,816 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:45,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 26 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-18 15:51:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 177. [2022-02-18 15:51:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2556818181818183) internal successors, (397), 176 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:45,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 397 transitions. [2022-02-18 15:51:45,820 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 397 transitions. Word has length 18 [2022-02-18 15:51:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:45,822 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 397 transitions. [2022-02-18 15:51:45,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2022-02-18 15:51:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 397 transitions. [2022-02-18 15:51:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 15:51:45,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:45,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:45,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:46,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-18 15:51:46,035 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:46,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:46,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1031679842, now seen corresponding path program 14 times [2022-02-18 15:51:46,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:46,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012382171] [2022-02-18 15:51:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:46,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 15:51:46,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:46,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012382171] [2022-02-18 15:51:46,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012382171] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:46,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525099143] [2022-02-18 15:51:46,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 15:51:46,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:46,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:46,072 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) [2022-02-18 15:51:46,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-18 15:51:46,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 15:51:46,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:46,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-18 15:51:46,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:46,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:46,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525099143] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:46,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:46,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 11 [2022-02-18 15:51:46,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922585156] [2022-02-18 15:51:46,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:46,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-18 15:51:46,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:46,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-18 15:51:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-18 15:51:46,329 INFO L87 Difference]: Start difference. First operand 177 states and 397 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:46,542 INFO L93 Difference]: Finished difference Result 461 states and 960 transitions. [2022-02-18 15:51:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-18 15:51:46,543 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-18 15:51:46,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:46,544 INFO L225 Difference]: With dead ends: 461 [2022-02-18 15:51:46,544 INFO L226 Difference]: Without dead ends: 443 [2022-02-18 15:51:46,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-02-18 15:51:46,545 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 175 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:46,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 88 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 15:51:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-02-18 15:51:46,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 222. [2022-02-18 15:51:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3076923076923075) internal successors, (510), 221 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 510 transitions. [2022-02-18 15:51:46,551 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 510 transitions. Word has length 18 [2022-02-18 15:51:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:46,551 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 510 transitions. [2022-02-18 15:51:46,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 510 transitions. [2022-02-18 15:51:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 15:51:46,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:46,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:46,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:46,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:46,752 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:46,753 INFO L85 PathProgramCache]: Analyzing trace with hash 907963746, now seen corresponding path program 15 times [2022-02-18 15:51:46,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:46,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554678270] [2022-02-18 15:51:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:46,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 15:51:46,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:46,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554678270] [2022-02-18 15:51:46,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554678270] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:46,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843880] [2022-02-18 15:51:46,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 15:51:46,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:46,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:46,791 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) [2022-02-18 15:51:46,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-18 15:51:46,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 15:51:46,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:46,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-18 15:51:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 15:51:46,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 15:51:46,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:46,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:46,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-02-18 15:51:46,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329446068] [2022-02-18 15:51:46,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:46,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 15:51:46,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 15:51:46,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 15:51:46,894 INFO L87 Difference]: Start difference. First operand 222 states and 510 transitions. Second operand has 5 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) [2022-02-18 15:51:46,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:46,942 INFO L93 Difference]: Finished difference Result 325 states and 717 transitions. [2022-02-18 15:51:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 15:51:46,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 [2022-02-18 15:51:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:46,944 INFO L225 Difference]: With dead ends: 325 [2022-02-18 15:51:46,944 INFO L226 Difference]: Without dead ends: 316 [2022-02-18 15:51:46,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 15:51:46,944 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:46,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-18 15:51:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 263. [2022-02-18 15:51:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.33587786259542) internal successors, (612), 262 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 612 transitions. [2022-02-18 15:51:46,950 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 612 transitions. Word has length 18 [2022-02-18 15:51:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:46,950 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 612 transitions. [2022-02-18 15:51:46,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2022-02-18 15:51:46,950 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 612 transitions. [2022-02-18 15:51:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:46,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:46,951 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:46,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:47,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:47,165 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:47,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1599393312, now seen corresponding path program 16 times [2022-02-18 15:51:47,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:47,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310189051] [2022-02-18 15:51:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:47,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:47,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:47,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310189051] [2022-02-18 15:51:47,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310189051] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:47,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495265677] [2022-02-18 15:51:47,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 15:51:47,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:47,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:47,202 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) [2022-02-18 15:51:47,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-18 15:51:47,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 15:51:47,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:47,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:47,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:47,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:47,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495265677] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:47,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:47,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-18 15:51:47,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115731967] [2022-02-18 15:51:47,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:47,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-18 15:51:47,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:47,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-18 15:51:47,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-18 15:51:47,299 INFO L87 Difference]: Start difference. First operand 263 states and 612 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:47,421 INFO L93 Difference]: Finished difference Result 408 states and 863 transitions. [2022-02-18 15:51:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-18 15:51:47,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 15:51:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:47,423 INFO L225 Difference]: With dead ends: 408 [2022-02-18 15:51:47,423 INFO L226 Difference]: Without dead ends: 408 [2022-02-18 15:51:47,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-18 15:51:47,424 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:47,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 48 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-02-18 15:51:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 247. [2022-02-18 15:51:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.3252032520325203) internal successors, (572), 246 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 572 transitions. [2022-02-18 15:51:47,430 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 572 transitions. Word has length 20 [2022-02-18 15:51:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:47,430 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 572 transitions. [2022-02-18 15:51:47,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 572 transitions. [2022-02-18 15:51:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:47,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:47,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:47,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:47,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:47,647 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:47,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:47,647 INFO L85 PathProgramCache]: Analyzing trace with hash 917259044, now seen corresponding path program 17 times [2022-02-18 15:51:47,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:47,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129173684] [2022-02-18 15:51:47,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:47,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:47,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:47,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129173684] [2022-02-18 15:51:47,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129173684] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:47,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022998884] [2022-02-18 15:51:47,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 15:51:47,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:47,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:47,679 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) [2022-02-18 15:51:47,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-18 15:51:47,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:47,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:47,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:47,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-18 15:51:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:47,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:47,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022998884] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:47,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:47,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-18 15:51:47,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474912278] [2022-02-18 15:51:47,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:47,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-18 15:51:47,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:47,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-18 15:51:47,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-18 15:51:47,771 INFO L87 Difference]: Start difference. First operand 247 states and 572 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:47,858 INFO L93 Difference]: Finished difference Result 378 states and 807 transitions. [2022-02-18 15:51:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-18 15:51:47,859 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 15:51:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:47,860 INFO L225 Difference]: With dead ends: 378 [2022-02-18 15:51:47,860 INFO L226 Difference]: Without dead ends: 361 [2022-02-18 15:51:47,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-18 15:51:47,861 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 135 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:47,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 20 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-18 15:51:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 274. [2022-02-18 15:51:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.3076923076923075) internal successors, (630), 273 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 630 transitions. [2022-02-18 15:51:47,867 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 630 transitions. Word has length 20 [2022-02-18 15:51:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:47,867 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 630 transitions. [2022-02-18 15:51:47,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 630 transitions. [2022-02-18 15:51:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:47,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:47,868 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:47,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:48,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:48,083 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash -699439250, now seen corresponding path program 18 times [2022-02-18 15:51:48,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:48,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126388477] [2022-02-18 15:51:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:48,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:48,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126388477] [2022-02-18 15:51:48,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126388477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:48,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116602444] [2022-02-18 15:51:48,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 15:51:48,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:48,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:48,112 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) [2022-02-18 15:51:48,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-18 15:51:48,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:48,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:48,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:48,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-18 15:51:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:48,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:48,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116602444] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:48,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:48,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-18 15:51:48,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306352545] [2022-02-18 15:51:48,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:48,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-18 15:51:48,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:48,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-18 15:51:48,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 15:51:48,192 INFO L87 Difference]: Start difference. First operand 274 states and 630 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:48,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:48,273 INFO L93 Difference]: Finished difference Result 361 states and 773 transitions. [2022-02-18 15:51:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-18 15:51:48,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 15:51:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:48,275 INFO L225 Difference]: With dead ends: 361 [2022-02-18 15:51:48,275 INFO L226 Difference]: Without dead ends: 361 [2022-02-18 15:51:48,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-18 15:51:48,275 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 69 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:48,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 29 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-18 15:51:48,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 253. [2022-02-18 15:51:48,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.261904761904762) internal successors, (570), 252 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:48,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 570 transitions. [2022-02-18 15:51:48,281 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 570 transitions. Word has length 20 [2022-02-18 15:51:48,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:48,281 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 570 transitions. [2022-02-18 15:51:48,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:48,281 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 570 transitions. [2022-02-18 15:51:48,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:48,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:48,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:48,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:48,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:48,491 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1188322480, now seen corresponding path program 19 times [2022-02-18 15:51:48,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:48,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42362359] [2022-02-18 15:51:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:48,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:48,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:48,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42362359] [2022-02-18 15:51:48,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42362359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:48,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633346504] [2022-02-18 15:51:48,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 15:51:48,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:48,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:48,521 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) [2022-02-18 15:51:48,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-18 15:51:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:48,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:48,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:48,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:48,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633346504] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:48,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:48,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-18 15:51:48,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817035008] [2022-02-18 15:51:48,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:48,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-18 15:51:48,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:48,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-18 15:51:48,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-18 15:51:48,609 INFO L87 Difference]: Start difference. First operand 253 states and 570 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:48,686 INFO L93 Difference]: Finished difference Result 308 states and 661 transitions. [2022-02-18 15:51:48,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-18 15:51:48,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 15:51:48,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:48,688 INFO L225 Difference]: With dead ends: 308 [2022-02-18 15:51:48,688 INFO L226 Difference]: Without dead ends: 305 [2022-02-18 15:51:48,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-18 15:51:48,688 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:48,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 17 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-18 15:51:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 253. [2022-02-18 15:51:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.257936507936508) internal successors, (569), 252 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 569 transitions. [2022-02-18 15:51:48,694 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 569 transitions. Word has length 20 [2022-02-18 15:51:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:48,694 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 569 transitions. [2022-02-18 15:51:48,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 569 transitions. [2022-02-18 15:51:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:48,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:48,695 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:48,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-02-18 15:51:48,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:48,903 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:48,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:48,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1554417312, now seen corresponding path program 20 times [2022-02-18 15:51:48,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:48,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380469645] [2022-02-18 15:51:48,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:48,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:48,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:48,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380469645] [2022-02-18 15:51:48,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380469645] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:48,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017471096] [2022-02-18 15:51:48,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 15:51:48,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:48,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:48,937 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) [2022-02-18 15:51:48,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-18 15:51:48,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 15:51:48,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:48,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:48,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:49,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:49,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017471096] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:49,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:49,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-18 15:51:49,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915229993] [2022-02-18 15:51:49,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:49,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-18 15:51:49,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:49,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-18 15:51:49,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-18 15:51:49,046 INFO L87 Difference]: Start difference. First operand 253 states and 569 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:49,129 INFO L93 Difference]: Finished difference Result 420 states and 883 transitions. [2022-02-18 15:51:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-18 15:51:49,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 15:51:49,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:49,131 INFO L225 Difference]: With dead ends: 420 [2022-02-18 15:51:49,131 INFO L226 Difference]: Without dead ends: 420 [2022-02-18 15:51:49,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-02-18 15:51:49,131 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:49,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 30 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-02-18 15:51:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 271. [2022-02-18 15:51:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.2888888888888888) internal successors, (618), 270 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 618 transitions. [2022-02-18 15:51:49,137 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 618 transitions. Word has length 20 [2022-02-18 15:51:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:49,137 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 618 transitions. [2022-02-18 15:51:49,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 618 transitions. [2022-02-18 15:51:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:49,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:49,138 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:49,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:49,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-18 15:51:49,354 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:49,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:49,355 INFO L85 PathProgramCache]: Analyzing trace with hash -722920028, now seen corresponding path program 21 times [2022-02-18 15:51:49,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:49,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931615539] [2022-02-18 15:51:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:49,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:49,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:49,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931615539] [2022-02-18 15:51:49,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931615539] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:49,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920935340] [2022-02-18 15:51:49,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 15:51:49,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:49,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:49,380 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) [2022-02-18 15:51:49,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-18 15:51:49,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 15:51:49,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:49,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:49,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-18 15:51:49,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-18 15:51:49,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920935340] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:49,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:49,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-02-18 15:51:49,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828442577] [2022-02-18 15:51:49,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:49,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-18 15:51:49,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:49,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-18 15:51:49,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-18 15:51:49,580 INFO L87 Difference]: Start difference. First operand 271 states and 618 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:49,951 INFO L93 Difference]: Finished difference Result 387 states and 834 transitions. [2022-02-18 15:51:49,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-18 15:51:49,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 15:51:49,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:49,952 INFO L225 Difference]: With dead ends: 387 [2022-02-18 15:51:49,952 INFO L226 Difference]: Without dead ends: 301 [2022-02-18 15:51:49,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2022-02-18 15:51:49,953 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 165 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:49,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 37 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:49,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-02-18 15:51:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 233. [2022-02-18 15:51:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.293103448275862) internal successors, (532), 232 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 532 transitions. [2022-02-18 15:51:49,958 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 532 transitions. Word has length 20 [2022-02-18 15:51:49,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:49,958 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 532 transitions. [2022-02-18 15:51:49,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 532 transitions. [2022-02-18 15:51:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:49,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:49,959 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:49,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:50,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-18 15:51:50,160 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:50,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1557292584, now seen corresponding path program 22 times [2022-02-18 15:51:50,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:50,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462897258] [2022-02-18 15:51:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:50,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:50,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:50,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462897258] [2022-02-18 15:51:50,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462897258] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:50,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053906759] [2022-02-18 15:51:50,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 15:51:50,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:50,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:50,192 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) [2022-02-18 15:51:50,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-18 15:51:50,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 15:51:50,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:50,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:50,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:50,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:50,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053906759] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:50,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:50,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-18 15:51:50,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65869237] [2022-02-18 15:51:50,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:50,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-18 15:51:50,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:50,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-18 15:51:50,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-18 15:51:50,279 INFO L87 Difference]: Start difference. First operand 233 states and 532 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:50,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:50,346 INFO L93 Difference]: Finished difference Result 322 states and 671 transitions. [2022-02-18 15:51:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-18 15:51:50,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 15:51:50,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:50,348 INFO L225 Difference]: With dead ends: 322 [2022-02-18 15:51:50,348 INFO L226 Difference]: Without dead ends: 316 [2022-02-18 15:51:50,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-18 15:51:50,348 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 77 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:50,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 25 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-18 15:51:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 207. [2022-02-18 15:51:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.2718446601941746) internal successors, (468), 206 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 468 transitions. [2022-02-18 15:51:50,353 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 468 transitions. Word has length 20 [2022-02-18 15:51:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:50,353 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 468 transitions. [2022-02-18 15:51:50,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 468 transitions. [2022-02-18 15:51:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:50,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:50,354 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:50,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:50,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-18 15:51:50,563 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:50,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1019437006, now seen corresponding path program 23 times [2022-02-18 15:51:50,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:50,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501447504] [2022-02-18 15:51:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:50,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:50,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:50,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501447504] [2022-02-18 15:51:50,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501447504] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:50,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611958617] [2022-02-18 15:51:50,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 15:51:50,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:50,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:50,592 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) [2022-02-18 15:51:50,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-18 15:51:50,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-18 15:51:50,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:50,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:50,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:50,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:50,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611958617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:50,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:50,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-18 15:51:50,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066776493] [2022-02-18 15:51:50,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:50,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-18 15:51:50,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-18 15:51:50,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-18 15:51:50,674 INFO L87 Difference]: Start difference. First operand 207 states and 468 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:50,765 INFO L93 Difference]: Finished difference Result 278 states and 577 transitions. [2022-02-18 15:51:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-18 15:51:50,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 15:51:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:50,766 INFO L225 Difference]: With dead ends: 278 [2022-02-18 15:51:50,766 INFO L226 Difference]: Without dead ends: 269 [2022-02-18 15:51:50,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-18 15:51:50,767 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:50,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 24 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:50,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-18 15:51:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 210. [2022-02-18 15:51:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2679425837320575) internal successors, (474), 209 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 474 transitions. [2022-02-18 15:51:50,771 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 474 transitions. Word has length 20 [2022-02-18 15:51:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:50,771 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 474 transitions. [2022-02-18 15:51:50,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 474 transitions. [2022-02-18 15:51:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:50,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:50,772 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:50,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:50,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:50,988 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:50,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1223925326, now seen corresponding path program 24 times [2022-02-18 15:51:50,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:50,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134798343] [2022-02-18 15:51:50,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:50,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:51,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:51,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134798343] [2022-02-18 15:51:51,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134798343] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:51,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472754209] [2022-02-18 15:51:51,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 15:51:51,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:51,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:51,018 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) [2022-02-18 15:51:51,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-18 15:51:51,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-18 15:51:51,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:51,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:51,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:51,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:51,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472754209] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:51,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:51,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-18 15:51:51,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380778320] [2022-02-18 15:51:51,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:51,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-18 15:51:51,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:51,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-18 15:51:51,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-18 15:51:51,111 INFO L87 Difference]: Start difference. First operand 210 states and 474 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:51,192 INFO L93 Difference]: Finished difference Result 254 states and 535 transitions. [2022-02-18 15:51:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-18 15:51:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-18 15:51:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:51,193 INFO L225 Difference]: With dead ends: 254 [2022-02-18 15:51:51,193 INFO L226 Difference]: Without dead ends: 245 [2022-02-18 15:51:51,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-02-18 15:51:51,194 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:51,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 21 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:51,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-18 15:51:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 209. [2022-02-18 15:51:51,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2451923076923075) internal successors, (467), 208 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 467 transitions. [2022-02-18 15:51:51,197 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 467 transitions. Word has length 20 [2022-02-18 15:51:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:51,197 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 467 transitions. [2022-02-18 15:51:51,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 467 transitions. [2022-02-18 15:51:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:51,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:51,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:51,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:51,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-18 15:51:51,414 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:51,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:51,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1372633952, now seen corresponding path program 25 times [2022-02-18 15:51:51,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:51,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065171430] [2022-02-18 15:51:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:51,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:51,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:51,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065171430] [2022-02-18 15:51:51,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065171430] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:51,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290870699] [2022-02-18 15:51:51,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 15:51:51,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:51,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:51,445 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) [2022-02-18 15:51:51,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-18 15:51:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:51,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:51,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:51,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:51,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290870699] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:51,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:51,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-18 15:51:51,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814082195] [2022-02-18 15:51:51,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:51,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-18 15:51:51,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:51,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-18 15:51:51,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 15:51:51,524 INFO L87 Difference]: Start difference. First operand 209 states and 467 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:51,600 INFO L93 Difference]: Finished difference Result 310 states and 646 transitions. [2022-02-18 15:51:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-18 15:51:51,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-18 15:51:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:51,602 INFO L225 Difference]: With dead ends: 310 [2022-02-18 15:51:51,602 INFO L226 Difference]: Without dead ends: 307 [2022-02-18 15:51:51,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-18 15:51:51,602 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:51,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 23 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-02-18 15:51:51,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 222. [2022-02-18 15:51:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.276018099547511) internal successors, (503), 221 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 503 transitions. [2022-02-18 15:51:51,606 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 503 transitions. Word has length 20 [2022-02-18 15:51:51,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:51,607 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 503 transitions. [2022-02-18 15:51:51,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:51,607 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 503 transitions. [2022-02-18 15:51:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:51,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:51,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:51,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:51,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-18 15:51:51,808 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash 299506678, now seen corresponding path program 26 times [2022-02-18 15:51:51,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:51,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600840678] [2022-02-18 15:51:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:51,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:51,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:51,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600840678] [2022-02-18 15:51:51,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600840678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:51,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522591282] [2022-02-18 15:51:51,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 15:51:51,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:51,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:51,845 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) [2022-02-18 15:51:51,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-18 15:51:51,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 15:51:51,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:51,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:51,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:51,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:51,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522591282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:51,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:51,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-18 15:51:51,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243876735] [2022-02-18 15:51:51,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:51,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-18 15:51:51,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:51,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-18 15:51:51,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-18 15:51:51,926 INFO L87 Difference]: Start difference. First operand 222 states and 503 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:52,010 INFO L93 Difference]: Finished difference Result 330 states and 707 transitions. [2022-02-18 15:51:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-18 15:51:52,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-18 15:51:52,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:52,011 INFO L225 Difference]: With dead ends: 330 [2022-02-18 15:51:52,011 INFO L226 Difference]: Without dead ends: 330 [2022-02-18 15:51:52,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-02-18 15:51:52,012 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:52,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 24 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-02-18 15:51:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 238. [2022-02-18 15:51:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.3037974683544302) internal successors, (546), 237 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 546 transitions. [2022-02-18 15:51:52,017 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 546 transitions. Word has length 20 [2022-02-18 15:51:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:52,017 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 546 transitions. [2022-02-18 15:51:52,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 546 transitions. [2022-02-18 15:51:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:52,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:52,018 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:52,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:52,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:52,231 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:52,232 INFO L85 PathProgramCache]: Analyzing trace with hash -189376552, now seen corresponding path program 27 times [2022-02-18 15:51:52,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:52,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130643965] [2022-02-18 15:51:52,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:52,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:52,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:52,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130643965] [2022-02-18 15:51:52,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130643965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:52,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080637625] [2022-02-18 15:51:52,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 15:51:52,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:52,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:52,269 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) [2022-02-18 15:51:52,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-18 15:51:52,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:52,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:52,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:52,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-18 15:51:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:52,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:52,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080637625] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:52,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:52,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-18 15:51:52,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682494954] [2022-02-18 15:51:52,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:52,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-18 15:51:52,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-18 15:51:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 15:51:52,353 INFO L87 Difference]: Start difference. First operand 238 states and 546 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:52,421 INFO L93 Difference]: Finished difference Result 322 states and 681 transitions. [2022-02-18 15:51:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-18 15:51:52,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-18 15:51:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:52,422 INFO L225 Difference]: With dead ends: 322 [2022-02-18 15:51:52,422 INFO L226 Difference]: Without dead ends: 319 [2022-02-18 15:51:52,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-18 15:51:52,423 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:52,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 21 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-02-18 15:51:52,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 238. [2022-02-18 15:51:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.29957805907173) internal successors, (545), 237 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 545 transitions. [2022-02-18 15:51:52,427 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 545 transitions. Word has length 20 [2022-02-18 15:51:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:52,427 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 545 transitions. [2022-02-18 15:51:52,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 545 transitions. [2022-02-18 15:51:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:52,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:52,428 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:52,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:52,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:52,631 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:52,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:52,632 INFO L85 PathProgramCache]: Analyzing trace with hash -773578702, now seen corresponding path program 28 times [2022-02-18 15:51:52,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:52,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804333534] [2022-02-18 15:51:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:52,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:52,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:52,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804333534] [2022-02-18 15:51:52,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804333534] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:52,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344163570] [2022-02-18 15:51:52,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 15:51:52,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:52,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:52,662 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) [2022-02-18 15:51:52,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-18 15:51:52,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 15:51:52,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:52,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:52,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:52,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:52,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344163570] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:52,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:52,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-02-18 15:51:52,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453196181] [2022-02-18 15:51:52,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:52,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-18 15:51:52,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-18 15:51:52,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-02-18 15:51:52,753 INFO L87 Difference]: Start difference. First operand 238 states and 545 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:52,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:52,863 INFO L93 Difference]: Finished difference Result 348 states and 748 transitions. [2022-02-18 15:51:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-18 15:51:52,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-18 15:51:52,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:52,864 INFO L225 Difference]: With dead ends: 348 [2022-02-18 15:51:52,864 INFO L226 Difference]: Without dead ends: 348 [2022-02-18 15:51:52,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-02-18 15:51:52,865 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:52,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 28 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-18 15:51:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 224. [2022-02-18 15:51:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2645739910313902) internal successors, (505), 223 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 505 transitions. [2022-02-18 15:51:52,869 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 505 transitions. Word has length 20 [2022-02-18 15:51:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:52,869 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 505 transitions. [2022-02-18 15:51:52,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 505 transitions. [2022-02-18 15:51:52,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:52,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:52,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:52,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:53,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:53,087 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:53,088 INFO L85 PathProgramCache]: Analyzing trace with hash 348479026, now seen corresponding path program 29 times [2022-02-18 15:51:53,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:53,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988960373] [2022-02-18 15:51:53,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:53,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:53,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:53,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988960373] [2022-02-18 15:51:53,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988960373] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:53,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523075796] [2022-02-18 15:51:53,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 15:51:53,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:53,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:53,116 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) [2022-02-18 15:51:53,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-18 15:51:53,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-18 15:51:53,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:53,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:53,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:53,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:53,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523075796] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:53,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:53,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-02-18 15:51:53,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353688694] [2022-02-18 15:51:53,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:53,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-18 15:51:53,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-18 15:51:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-18 15:51:53,199 INFO L87 Difference]: Start difference. First operand 224 states and 505 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:53,267 INFO L93 Difference]: Finished difference Result 329 states and 681 transitions. [2022-02-18 15:51:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-18 15:51:53,267 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-18 15:51:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:53,269 INFO L225 Difference]: With dead ends: 329 [2022-02-18 15:51:53,269 INFO L226 Difference]: Without dead ends: 320 [2022-02-18 15:51:53,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-18 15:51:53,269 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:53,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 22 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-18 15:51:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 224. [2022-02-18 15:51:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2556053811659194) internal successors, (503), 223 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:53,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 503 transitions. [2022-02-18 15:51:53,273 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 503 transitions. Word has length 20 [2022-02-18 15:51:53,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:53,273 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 503 transitions. [2022-02-18 15:51:53,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 503 transitions. [2022-02-18 15:51:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:53,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:53,274 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:53,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:53,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:53,483 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash 971705334, now seen corresponding path program 30 times [2022-02-18 15:51:53,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:53,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699699854] [2022-02-18 15:51:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:53,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:53,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699699854] [2022-02-18 15:51:53,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699699854] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:53,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116712549] [2022-02-18 15:51:53,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 15:51:53,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:53,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:53,512 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) [2022-02-18 15:51:53,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-18 15:51:53,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-18 15:51:53,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:53,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:53,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:53,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:53,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116712549] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:53,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:53,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-18 15:51:53,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218479201] [2022-02-18 15:51:53,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:53,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-18 15:51:53,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:53,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-18 15:51:53,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-18 15:51:53,617 INFO L87 Difference]: Start difference. First operand 224 states and 503 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:53,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:53,710 INFO L93 Difference]: Finished difference Result 302 states and 629 transitions. [2022-02-18 15:51:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-18 15:51:53,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-18 15:51:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:53,711 INFO L225 Difference]: With dead ends: 302 [2022-02-18 15:51:53,711 INFO L226 Difference]: Without dead ends: 299 [2022-02-18 15:51:53,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-18 15:51:53,712 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 47 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:53,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 27 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-18 15:51:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 208. [2022-02-18 15:51:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.251207729468599) internal successors, (466), 207 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 466 transitions. [2022-02-18 15:51:53,715 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 466 transitions. Word has length 20 [2022-02-18 15:51:53,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:53,716 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 466 transitions. [2022-02-18 15:51:53,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:53,716 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 466 transitions. [2022-02-18 15:51:53,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 15:51:53,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:53,716 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:53,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:53,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-02-18 15:51:53,935 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1875608010, now seen corresponding path program 31 times [2022-02-18 15:51:53,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:53,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565970868] [2022-02-18 15:51:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:53,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:53,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:53,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565970868] [2022-02-18 15:51:53,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565970868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:53,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749550304] [2022-02-18 15:51:53,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 15:51:53,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:53,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:53,969 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) [2022-02-18 15:51:53,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-18 15:51:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:53,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:53,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:54,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:54,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749550304] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:54,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:54,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-18 15:51:54,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630267134] [2022-02-18 15:51:54,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:54,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-18 15:51:54,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:54,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-18 15:51:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-18 15:51:54,042 INFO L87 Difference]: Start difference. First operand 208 states and 466 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:54,140 INFO L93 Difference]: Finished difference Result 298 states and 611 transitions. [2022-02-18 15:51:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-18 15:51:54,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-02-18 15:51:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:54,141 INFO L225 Difference]: With dead ends: 298 [2022-02-18 15:51:54,141 INFO L226 Difference]: Without dead ends: 283 [2022-02-18 15:51:54,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-18 15:51:54,142 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 73 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:54,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 24 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-18 15:51:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 214. [2022-02-18 15:51:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.23943661971831) internal successors, (477), 213 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:54,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 477 transitions. [2022-02-18 15:51:54,146 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 477 transitions. Word has length 20 [2022-02-18 15:51:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:54,146 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 477 transitions. [2022-02-18 15:51:54,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 477 transitions. [2022-02-18 15:51:54,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-18 15:51:54,146 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:54,146 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:54,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:54,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:54,351 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:54,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:54,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2067147052, now seen corresponding path program 32 times [2022-02-18 15:51:54,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:54,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089957176] [2022-02-18 15:51:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:54,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:54,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:54,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089957176] [2022-02-18 15:51:54,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089957176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:54,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537785799] [2022-02-18 15:51:54,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 15:51:54,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:54,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:54,396 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) [2022-02-18 15:51:54,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-18 15:51:54,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 15:51:54,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:54,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-18 15:51:54,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:54,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:54,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537785799] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:54,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:54,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 12 [2022-02-18 15:51:54,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616759632] [2022-02-18 15:51:54,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:54,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-18 15:51:54,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:54,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-18 15:51:54,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-18 15:51:54,699 INFO L87 Difference]: Start difference. First operand 214 states and 477 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:54,904 INFO L93 Difference]: Finished difference Result 359 states and 739 transitions. [2022-02-18 15:51:54,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-18 15:51:54,904 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-18 15:51:54,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:54,905 INFO L225 Difference]: With dead ends: 359 [2022-02-18 15:51:54,905 INFO L226 Difference]: Without dead ends: 329 [2022-02-18 15:51:54,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-02-18 15:51:54,906 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:54,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 72 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-18 15:51:54,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 246. [2022-02-18 15:51:54,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.216326530612245) internal successors, (543), 245 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 543 transitions. [2022-02-18 15:51:54,909 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 543 transitions. Word has length 22 [2022-02-18 15:51:54,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:54,909 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 543 transitions. [2022-02-18 15:51:54,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:54,910 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 543 transitions. [2022-02-18 15:51:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-18 15:51:54,910 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:54,910 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:54,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:55,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:55,123 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:55,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:55,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1673184418, now seen corresponding path program 33 times [2022-02-18 15:51:55,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:55,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561876086] [2022-02-18 15:51:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:55,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 15:51:55,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:55,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561876086] [2022-02-18 15:51:55,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561876086] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:55,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190190961] [2022-02-18 15:51:55,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 15:51:55,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:55,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:55,164 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) [2022-02-18 15:51:55,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-18 15:51:55,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 15:51:55,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:55,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:55,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-18 15:51:55,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-18 15:51:55,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190190961] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:55,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:55,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-02-18 15:51:55,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901255137] [2022-02-18 15:51:55,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:55,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-18 15:51:55,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:55,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-18 15:51:55,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-18 15:51:55,394 INFO L87 Difference]: Start difference. First operand 246 states and 543 transitions. Second operand has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:55,779 INFO L93 Difference]: Finished difference Result 471 states and 971 transitions. [2022-02-18 15:51:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-18 15:51:55,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-18 15:51:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:55,780 INFO L225 Difference]: With dead ends: 471 [2022-02-18 15:51:55,780 INFO L226 Difference]: Without dead ends: 426 [2022-02-18 15:51:55,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2022-02-18 15:51:55,781 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 214 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:55,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 99 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 15:51:55,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-02-18 15:51:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 290. [2022-02-18 15:51:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.13840830449827) internal successors, (618), 289 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 618 transitions. [2022-02-18 15:51:55,786 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 618 transitions. Word has length 22 [2022-02-18 15:51:55,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:55,786 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 618 transitions. [2022-02-18 15:51:55,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:55,786 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 618 transitions. [2022-02-18 15:51:55,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-18 15:51:55,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:55,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:55,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:55,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-18 15:51:55,987 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:55,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1350863530, now seen corresponding path program 34 times [2022-02-18 15:51:55,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:55,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467285126] [2022-02-18 15:51:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:55,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 15:51:56,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:56,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467285126] [2022-02-18 15:51:56,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467285126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:56,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353987382] [2022-02-18 15:51:56,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 15:51:56,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:56,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:56,026 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) [2022-02-18 15:51:56,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-18 15:51:56,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 15:51:56,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:56,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-18 15:51:56,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 15:51:56,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 15:51:56,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353987382] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:56,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:56,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-18 15:51:56,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706894158] [2022-02-18 15:51:56,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:56,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 15:51:56,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:56,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 15:51:56,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-18 15:51:56,157 INFO L87 Difference]: Start difference. First operand 290 states and 618 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:56,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:56,233 INFO L93 Difference]: Finished difference Result 426 states and 886 transitions. [2022-02-18 15:51:56,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-18 15:51:56,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-18 15:51:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:56,235 INFO L225 Difference]: With dead ends: 426 [2022-02-18 15:51:56,235 INFO L226 Difference]: Without dead ends: 417 [2022-02-18 15:51:56,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-18 15:51:56,235 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:56,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 41 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-02-18 15:51:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 357. [2022-02-18 15:51:56,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.1797752808988764) internal successors, (776), 356 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 776 transitions. [2022-02-18 15:51:56,240 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 776 transitions. Word has length 22 [2022-02-18 15:51:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:56,240 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 776 transitions. [2022-02-18 15:51:56,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 776 transitions. [2022-02-18 15:51:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-18 15:51:56,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:56,241 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:56,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:56,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-18 15:51:56,457 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:56,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1881476522, now seen corresponding path program 35 times [2022-02-18 15:51:56,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:56,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535459482] [2022-02-18 15:51:56,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:56,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 15:51:56,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:56,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535459482] [2022-02-18 15:51:56,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535459482] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:56,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75359620] [2022-02-18 15:51:56,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 15:51:56,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:56,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:56,495 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) [2022-02-18 15:51:56,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-18 15:51:56,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-18 15:51:56,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:56,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-18 15:51:56,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 15:51:56,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 15:51:56,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75359620] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:56,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:56,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-18 15:51:56,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188311392] [2022-02-18 15:51:56,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:56,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 15:51:56,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:56,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 15:51:56,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-18 15:51:56,615 INFO L87 Difference]: Start difference. First operand 357 states and 776 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:56,720 INFO L93 Difference]: Finished difference Result 477 states and 1004 transitions. [2022-02-18 15:51:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-18 15:51:56,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-18 15:51:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:56,722 INFO L225 Difference]: With dead ends: 477 [2022-02-18 15:51:56,722 INFO L226 Difference]: Without dead ends: 468 [2022-02-18 15:51:56,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-18 15:51:56,723 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:56,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 36 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-02-18 15:51:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 408. [2022-02-18 15:51:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.1965601965601964) internal successors, (894), 407 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 894 transitions. [2022-02-18 15:51:56,729 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 894 transitions. Word has length 22 [2022-02-18 15:51:56,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:56,729 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 894 transitions. [2022-02-18 15:51:56,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 894 transitions. [2022-02-18 15:51:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-18 15:51:56,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:56,730 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:56,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:56,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-18 15:51:56,946 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:56,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:56,946 INFO L85 PathProgramCache]: Analyzing trace with hash -570097848, now seen corresponding path program 36 times [2022-02-18 15:51:56,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:56,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521271164] [2022-02-18 15:51:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:56,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:56,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:56,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521271164] [2022-02-18 15:51:56,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521271164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:56,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984243082] [2022-02-18 15:51:56,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 15:51:56,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:56,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:56,994 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) [2022-02-18 15:51:56,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-18 15:51:57,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-18 15:51:57,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:57,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-18 15:51:57,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:57,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:57,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984243082] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:57,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:57,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-18 15:51:57,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874948913] [2022-02-18 15:51:57,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:57,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-18 15:51:57,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:57,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-18 15:51:57,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-18 15:51:57,091 INFO L87 Difference]: Start difference. First operand 408 states and 894 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:57,252 INFO L93 Difference]: Finished difference Result 512 states and 1072 transitions. [2022-02-18 15:51:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-18 15:51:57,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-02-18 15:51:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:57,264 INFO L225 Difference]: With dead ends: 512 [2022-02-18 15:51:57,264 INFO L226 Difference]: Without dead ends: 512 [2022-02-18 15:51:57,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-02-18 15:51:57,264 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:57,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 64 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-02-18 15:51:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 402. [2022-02-18 15:51:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.199501246882793) internal successors, (882), 401 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 882 transitions. [2022-02-18 15:51:57,270 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 882 transitions. Word has length 24 [2022-02-18 15:51:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:57,271 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 882 transitions. [2022-02-18 15:51:57,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 882 transitions. [2022-02-18 15:51:57,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-18 15:51:57,271 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:57,271 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:57,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:57,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-18 15:51:57,488 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:57,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1395949260, now seen corresponding path program 37 times [2022-02-18 15:51:57,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:57,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625446589] [2022-02-18 15:51:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:57,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:57,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:57,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625446589] [2022-02-18 15:51:57,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625446589] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:57,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461533114] [2022-02-18 15:51:57,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 15:51:57,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:57,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:57,520 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) [2022-02-18 15:51:57,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-18 15:51:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:57,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-18 15:51:57,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:57,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:57,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461533114] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:57,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:57,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-18 15:51:57,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109778259] [2022-02-18 15:51:57,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:57,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-18 15:51:57,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:57,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-18 15:51:57,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-18 15:51:57,607 INFO L87 Difference]: Start difference. First operand 402 states and 882 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:57,663 INFO L93 Difference]: Finished difference Result 418 states and 902 transitions. [2022-02-18 15:51:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-18 15:51:57,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-02-18 15:51:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:57,665 INFO L225 Difference]: With dead ends: 418 [2022-02-18 15:51:57,665 INFO L226 Difference]: Without dead ends: 415 [2022-02-18 15:51:57,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-02-18 15:51:57,665 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:57,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 19 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-02-18 15:51:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 402. [2022-02-18 15:51:57,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.197007481296758) internal successors, (881), 401 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 881 transitions. [2022-02-18 15:51:57,670 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 881 transitions. Word has length 24 [2022-02-18 15:51:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:57,670 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 881 transitions. [2022-02-18 15:51:57,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 881 transitions. [2022-02-18 15:51:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-18 15:51:57,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:57,671 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:57,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:57,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:57,887 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:57,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:57,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1328082766, now seen corresponding path program 38 times [2022-02-18 15:51:57,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:57,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004890597] [2022-02-18 15:51:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:57,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:57,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:57,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004890597] [2022-02-18 15:51:57,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004890597] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:57,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254185825] [2022-02-18 15:51:57,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 15:51:57,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:57,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:57,918 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) [2022-02-18 15:51:57,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-18 15:51:57,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 15:51:57,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:57,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-18 15:51:57,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:57,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:58,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254185825] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:58,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:58,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-02-18 15:51:58,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978923546] [2022-02-18 15:51:58,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:58,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-18 15:51:58,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:58,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-18 15:51:58,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-18 15:51:58,007 INFO L87 Difference]: Start difference. First operand 402 states and 881 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:58,110 INFO L93 Difference]: Finished difference Result 588 states and 1220 transitions. [2022-02-18 15:51:58,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-18 15:51:58,110 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-02-18 15:51:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:58,112 INFO L225 Difference]: With dead ends: 588 [2022-02-18 15:51:58,112 INFO L226 Difference]: Without dead ends: 588 [2022-02-18 15:51:58,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-02-18 15:51:58,112 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 82 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:58,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 25 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-02-18 15:51:58,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 360. [2022-02-18 15:51:58,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.161559888579387) internal successors, (776), 359 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:58,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 776 transitions. [2022-02-18 15:51:58,118 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 776 transitions. Word has length 24 [2022-02-18 15:51:58,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:58,118 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 776 transitions. [2022-02-18 15:51:58,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:58,118 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 776 transitions. [2022-02-18 15:51:58,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-18 15:51:58,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:58,119 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:58,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:58,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-18 15:51:58,334 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:58,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1286137202, now seen corresponding path program 39 times [2022-02-18 15:51:58,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:58,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291951732] [2022-02-18 15:51:58,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:58,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:58,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:58,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291951732] [2022-02-18 15:51:58,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291951732] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:58,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532250847] [2022-02-18 15:51:58,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 15:51:58,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:58,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:58,370 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) [2022-02-18 15:51:58,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-18 15:51:58,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-18 15:51:58,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:58,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:58,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-18 15:51:58,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-18 15:51:58,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532250847] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 15:51:58,458 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-18 15:51:58,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2022-02-18 15:51:58,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587442369] [2022-02-18 15:51:58,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 15:51:58,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-18 15:51:58,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:58,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-18 15:51:58,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-18 15:51:58,459 INFO L87 Difference]: Start difference. First operand 360 states and 776 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:58,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:58,505 INFO L93 Difference]: Finished difference Result 437 states and 916 transitions. [2022-02-18 15:51:58,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-18 15:51:58,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-18 15:51:58,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:58,507 INFO L225 Difference]: With dead ends: 437 [2022-02-18 15:51:58,507 INFO L226 Difference]: Without dead ends: 329 [2022-02-18 15:51:58,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-18 15:51:58,507 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:58,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 20 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 15:51:58,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-18 15:51:58,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 291. [2022-02-18 15:51:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.093103448275862) internal successors, (607), 290 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 607 transitions. [2022-02-18 15:51:58,511 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 607 transitions. Word has length 24 [2022-02-18 15:51:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:58,512 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 607 transitions. [2022-02-18 15:51:58,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 607 transitions. [2022-02-18 15:51:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-18 15:51:58,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:58,512 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:58,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:58,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-18 15:51:58,727 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:58,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1776796524, now seen corresponding path program 40 times [2022-02-18 15:51:58,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:58,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871141554] [2022-02-18 15:51:58,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:58,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 15:51:58,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:58,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871141554] [2022-02-18 15:51:58,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871141554] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:58,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760817311] [2022-02-18 15:51:58,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 15:51:58,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:58,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:58,766 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) [2022-02-18 15:51:58,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-18 15:51:58,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 15:51:58,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:58,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-18 15:51:58,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:58,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:58,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760817311] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:58,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:58,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-18 15:51:58,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254514820] [2022-02-18 15:51:58,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:58,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-18 15:51:58,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:58,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-18 15:51:58,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-18 15:51:58,854 INFO L87 Difference]: Start difference. First operand 291 states and 607 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:58,963 INFO L93 Difference]: Finished difference Result 391 states and 780 transitions. [2022-02-18 15:51:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-18 15:51:58,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-02-18 15:51:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:58,964 INFO L225 Difference]: With dead ends: 391 [2022-02-18 15:51:58,964 INFO L226 Difference]: Without dead ends: 391 [2022-02-18 15:51:58,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-18 15:51:58,965 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 55 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:58,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 28 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-02-18 15:51:58,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 283. [2022-02-18 15:51:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.0886524822695036) internal successors, (589), 282 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:58,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 589 transitions. [2022-02-18 15:51:58,969 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 589 transitions. Word has length 24 [2022-02-18 15:51:58,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:58,969 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 589 transitions. [2022-02-18 15:51:58,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 589 transitions. [2022-02-18 15:51:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-18 15:51:58,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:58,970 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:58,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-18 15:51:59,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-02-18 15:51:59,183 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:59,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2035373036, now seen corresponding path program 41 times [2022-02-18 15:51:59,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:59,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353280582] [2022-02-18 15:51:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:59,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:59,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:59,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353280582] [2022-02-18 15:51:59,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353280582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:59,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749777320] [2022-02-18 15:51:59,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 15:51:59,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:59,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:59,215 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) [2022-02-18 15:51:59,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-18 15:51:59,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-18 15:51:59,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:59,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-18 15:51:59,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:59,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:59,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749777320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:59,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:59,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-18 15:51:59,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557326091] [2022-02-18 15:51:59,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:59,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-18 15:51:59,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:59,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-18 15:51:59,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-18 15:51:59,333 INFO L87 Difference]: Start difference. First operand 283 states and 589 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:51:59,405 INFO L93 Difference]: Finished difference Result 374 states and 754 transitions. [2022-02-18 15:51:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-18 15:51:59,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-02-18 15:51:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:51:59,406 INFO L225 Difference]: With dead ends: 374 [2022-02-18 15:51:59,406 INFO L226 Difference]: Without dead ends: 371 [2022-02-18 15:51:59,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-02-18 15:51:59,407 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:51:59,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 15 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:51:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-02-18 15:51:59,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 306. [2022-02-18 15:51:59,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.1049180327868853) internal successors, (642), 305 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:59,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 642 transitions. [2022-02-18 15:51:59,411 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 642 transitions. Word has length 24 [2022-02-18 15:51:59,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:51:59,411 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 642 transitions. [2022-02-18 15:51:59,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:51:59,412 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 642 transitions. [2022-02-18 15:51:59,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-18 15:51:59,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 15:51:59,412 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 15:51:59,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-18 15:51:59,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:59,627 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-18 15:51:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 15:51:59,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1186508880, now seen corresponding path program 42 times [2022-02-18 15:51:59,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 15:51:59,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810176375] [2022-02-18 15:51:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 15:51:59,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 15:51:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 15:51:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 15:51:59,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 15:51:59,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810176375] [2022-02-18 15:51:59,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810176375] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 15:51:59,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710401207] [2022-02-18 15:51:59,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 15:51:59,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:51:59,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 15:51:59,660 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) [2022-02-18 15:51:59,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-18 15:51:59,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-18 15:51:59,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 15:51:59,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 15:51:59,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 15:51:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-18 15:51:59,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 15:51:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-18 15:51:59,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710401207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 15:51:59,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 15:51:59,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-02-18 15:51:59,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289244944] [2022-02-18 15:51:59,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 15:51:59,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-18 15:51:59,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 15:51:59,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-18 15:51:59,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-02-18 15:51:59,850 INFO L87 Difference]: Start difference. First operand 306 states and 642 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:52:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 15:52:00,090 INFO L93 Difference]: Finished difference Result 319 states and 664 transitions. [2022-02-18 15:52:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-18 15:52:00,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-18 15:52:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 15:52:00,090 INFO L225 Difference]: With dead ends: 319 [2022-02-18 15:52:00,090 INFO L226 Difference]: Without dead ends: 0 [2022-02-18 15:52:00,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2022-02-18 15:52:00,091 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 125 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 15:52:00,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 22 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 15:52:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-18 15:52:00,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-18 15:52:00,091 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) [2022-02-18 15:52:00,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-18 15:52:00,092 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2022-02-18 15:52:00,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 15:52:00,092 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-18 15:52:00,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 15:52:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-18 15:52:00,092 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-18 15:52:00,094 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-18 15:52:00,094 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-18 15:52:00,094 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-18 15:52:00,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-18 15:52:00,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 15:52:00,297 INFO L732 BasicCegarLoop]: Path program histogram: [42, 2, 1, 1] [2022-02-18 15:52:00,298 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-18 15:52:00,298 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-18 15:52:00,300 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 03:52:00 BasicIcfg [2022-02-18 15:52:00,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-18 15:52:00,300 INFO L158 Benchmark]: Toolchain (without parser) took 20587.04ms. Allocated memory was 202.4MB in the beginning and 293.6MB in the end (delta: 91.2MB). Free memory was 166.1MB in the beginning and 196.7MB in the end (delta: -30.7MB). Peak memory consumption was 61.1MB. Max. memory is 8.0GB. [2022-02-18 15:52:00,300 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 202.4MB. Free memory was 167.2MB in the beginning and 167.0MB in the end (delta: 143.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-18 15:52:00,301 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.83ms. Allocated memory is still 202.4MB. Free memory was 166.1MB in the beginning and 164.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-18 15:52:00,301 INFO L158 Benchmark]: Boogie Preprocessor took 10.08ms. Allocated memory is still 202.4MB. Free memory was 164.5MB in the beginning and 163.6MB in the end (delta: 882.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-18 15:52:00,301 INFO L158 Benchmark]: RCFGBuilder took 169.05ms. Allocated memory is still 202.4MB. Free memory was 163.5MB in the beginning and 155.2MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-02-18 15:52:00,301 INFO L158 Benchmark]: TraceAbstraction took 20377.61ms. Allocated memory was 202.4MB in the beginning and 293.6MB in the end (delta: 91.2MB). Free memory was 154.6MB in the beginning and 196.7MB in the end (delta: -42.1MB). Peak memory consumption was 49.5MB. Max. memory is 8.0GB. [2022-02-18 15:52:00,301 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 0.10ms. Allocated memory is still 202.4MB. Free memory was 167.2MB in the beginning and 167.0MB in the end (delta: 143.3kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.83ms. Allocated memory is still 202.4MB. Free memory was 166.1MB in the beginning and 164.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.08ms. Allocated memory is still 202.4MB. Free memory was 164.5MB in the beginning and 163.6MB in the end (delta: 882.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 169.05ms. Allocated memory is still 202.4MB. Free memory was 163.5MB in the beginning and 155.2MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 20377.61ms. Allocated memory was 202.4MB in the beginning and 293.6MB in the end (delta: 91.2MB). Free memory was 154.6MB in the beginning and 196.7MB in the end (delta: -42.1MB). Peak memory consumption was 49.5MB. 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: 24]: 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, 27 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 20.3s, OverallIterations: 46, TraceHistogramMax: 4, PathProgramHistogramMax: 42, EmptinessCheckTime: 0.0s, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2841 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2841 mSDsluCounter, 1258 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2966 mSDsCounter, 668 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6577 IncrementalHoareTripleChecker+Invalid, 7245 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 668 mSolverCounterUnsat, 334 mSDtfsCounter, 6577 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2034 GetRequests, 1456 SyntacticMatches, 117 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=408occurred in iteration=39, InterpolantAutomatonStates: 483, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 46 MinimizatonAttempts, 3323 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 1680 NumberOfCodeBlocks, 1666 NumberOfCodeBlocksAsserted, 160 NumberOfCheckSat, 2343 ConstructedInterpolants, 0 QuantifiedInterpolants, 10613 SizeOfPredicates, 75 NumberOfNonLiveVariables, 1287 ConjunctsInSsa, 318 ConjunctsInUnsatCore, 129 InterpolantComputations, 5 PerfectInterpolantSequences, 684/1575 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! [2022-02-18 15:52:00,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...