/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-44898dd [2022-02-15 13:01:31,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 13:01:31,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 13:01:31,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-15 13:01:31,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-15 13:01:31,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-15 13:01:31,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-15 13:01:31,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-15 13:01:31,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-15 13:01:31,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-15 13:01:31,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-15 13:01:31,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-15 13:01:31,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 13:01:31,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 13:01:31,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 13:01:31,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 13:01:31,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 13:01:31,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 13:01:31,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 13:01:31,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 13:01:31,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 13:01:31,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 13:01:31,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 13:01:31,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 13:01:31,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-15 13:01:31,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-15 13:01:31,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-15 13:01:31,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-15 13:01:31,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-15 13:01:31,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-15 13:01:31,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-15 13:01:31,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-15 13:01:31,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-15 13:01:31,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-15 13:01:31,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-15 13:01:31,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-15 13:01:31,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-15 13:01:31,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-15 13:01:31,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 13:01:31,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 13:01:31,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 13:01:31,465 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 [2022-02-15 13:01:31,492 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 13:01:31,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 13:01:31,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 13:01:31,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 13:01:31,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 13:01:31,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 13:01:31,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 13:01:31,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 13:01:31,494 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 13:01:31,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 13:01:31,495 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 13:01:31,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 13:01:31,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 13:01:31,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 13:01:31,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 13:01:31,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 13:01:31,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 13:01:31,496 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 13:01:31,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 13:01:31,496 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 13:01:31,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 13:01:31,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 13:01:31,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 13:01:31,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 13:01:31,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 13:01:31,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:01:31,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 13:01:31,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 13:01:31,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 13:01:31,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 13:01:31,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 13:01:31,497 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 13:01:31,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 13:01:31,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 13:01:31,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 13:01:31,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 13:01:31,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 13:01:31,701 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 13:01:31,702 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 13:01:31,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl [2022-02-15 13:01:31,703 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl' [2022-02-15 13:01:31,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 13:01:31,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 13:01:31,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 13:01:31,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 13:01:31,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 13:01:31,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:01:31" (1/1) ... [2022-02-15 13:01:31,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:01:31" (1/1) ... [2022-02-15 13:01:31,748 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 13:01:31,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 13:01:31,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 13:01:31,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 13:01:31,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 13:01:31,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:01:31" (1/1) ... [2022-02-15 13:01:31,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:01:31" (1/1) ... [2022-02-15 13:01:31,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:01:31" (1/1) ... [2022-02-15 13:01:31,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:01:31" (1/1) ... [2022-02-15 13:01:31,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:01:31" (1/1) ... [2022-02-15 13:01:31,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:01:31" (1/1) ... [2022-02-15 13:01:31,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:01:31" (1/1) ... [2022-02-15 13:01:31,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 13:01:31,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 13:01:31,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 13:01:31,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 13:01:31,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:01:31" (1/1) ... [2022-02-15 13:01:31,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:01:31,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:31,780 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) [2022-02-15 13:01:31,783 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 [2022-02-15 13:01:31,804 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 13:01:31,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 13:01:31,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 13:01:31,805 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T1 given in one single declaration [2022-02-15 13:01:31,805 INFO L130 BoogieDeclarations]: Found specification of procedure T1 [2022-02-15 13:01:31,805 INFO L138 BoogieDeclarations]: Found implementation of procedure T1 [2022-02-15 13:01:31,805 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T2 given in one single declaration [2022-02-15 13:01:31,805 INFO L130 BoogieDeclarations]: Found specification of procedure T2 [2022-02-15 13:01:31,805 INFO L138 BoogieDeclarations]: Found implementation of procedure T2 [2022-02-15 13:01:31,806 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 13:01:31,835 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 13:01:31,836 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 13:01:31,922 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 13:01:31,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 13:01:31,927 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-15 13:01:31,929 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:01:31 BoogieIcfgContainer [2022-02-15 13:01:31,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 13:01:31,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 13:01:31,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 13:01:31,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 13:01:31,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:01:31" (1/2) ... [2022-02-15 13:01:31,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f97d088 and model type MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:01:31, skipping insertion in model container [2022-02-15 13:01:31,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:01:31" (2/2) ... [2022-02-15 13:01:31,937 INFO L111 eAbstractionObserver]: Analyzing ICFG MirabelleConcurrentIncrement.bpl [2022-02-15 13:01:31,945 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 13:01:31,945 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 13:01:31,945 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 13:01:31,946 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 13:01:31,988 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-02-15 13:01:32,028 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 13:01:32,036 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 [2022-02-15 13:01:32,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-15 13:01:32,044 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 62 flow [2022-02-15 13:01:32,059 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) [2022-02-15 13:01:32,061 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) [2022-02-15 13:01:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-15 13:01:32,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:32,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:32,066 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:32,070 INFO L85 PathProgramCache]: Analyzing trace with hash -295835678, now seen corresponding path program 1 times [2022-02-15 13:01:32,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:32,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514993343] [2022-02-15 13:01:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:32,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:32,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:32,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514993343] [2022-02-15 13:01:32,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514993343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:01:32,179 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:01:32,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-02-15 13:01:32,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538449368] [2022-02-15 13:01:32,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:01:32,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 13:01:32,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:32,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 13:01:32,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 13:01:32,203 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) [2022-02-15 13:01:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:32,255 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2022-02-15 13:01:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 13:01:32,257 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 [2022-02-15 13:01:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:32,264 INFO L225 Difference]: With dead ends: 61 [2022-02-15 13:01:32,264 INFO L226 Difference]: Without dead ends: 52 [2022-02-15 13:01:32,266 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 [2022-02-15 13:01:32,279 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 [2022-02-15 13:01:32,280 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] [2022-02-15 13:01:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-15 13:01:32,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-02-15 13:01:32,304 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) [2022-02-15 13:01:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2022-02-15 13:01:32,306 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 10 [2022-02-15 13:01:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:32,307 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2022-02-15 13:01:32,307 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) [2022-02-15 13:01:32,307 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2022-02-15 13:01:32,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 13:01:32,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:32,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:32,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 13:01:32,308 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:32,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1417289504, now seen corresponding path program 1 times [2022-02-15 13:01:32,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:32,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92528461] [2022-02-15 13:01:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:32,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:32,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:32,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92528461] [2022-02-15 13:01:32,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92528461] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:32,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564883299] [2022-02-15 13:01:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:32,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:32,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:32,392 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) [2022-02-15 13:01:32,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-15 13:01:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:32,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-15 13:01:32,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:32,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:32,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564883299] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:32,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:32,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-15 13:01:32,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899736547] [2022-02-15 13:01:32,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:32,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:01:32,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:01:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:01:32,556 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) [2022-02-15 13:01:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:32,651 INFO L93 Difference]: Finished difference Result 78 states and 145 transitions. [2022-02-15 13:01:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 13:01:32,652 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 [2022-02-15 13:01:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:32,653 INFO L225 Difference]: With dead ends: 78 [2022-02-15 13:01:32,653 INFO L226 Difference]: Without dead ends: 78 [2022-02-15 13:01:32,654 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 [2022-02-15 13:01:32,655 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:01:32,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:01:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-15 13:01:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2022-02-15 13:01:32,664 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) [2022-02-15 13:01:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2022-02-15 13:01:32,667 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2022-02-15 13:01:32,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:32,668 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2022-02-15 13:01:32,668 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) [2022-02-15 13:01:32,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2022-02-15 13:01:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 13:01:32,669 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:32,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:32,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-15 13:01:32,888 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 [2022-02-15 13:01:32,889 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:32,890 INFO L85 PathProgramCache]: Analyzing trace with hash -860047836, now seen corresponding path program 1 times [2022-02-15 13:01:32,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:32,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838772890] [2022-02-15 13:01:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:32,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:32,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:32,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838772890] [2022-02-15 13:01:32,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838772890] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:01:32,930 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:01:32,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 13:01:32,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059723927] [2022-02-15 13:01:32,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:01:32,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:01:32,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:32,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:01:32,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:01:32,932 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) [2022-02-15 13:01:32,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:32,959 INFO L93 Difference]: Finished difference Result 51 states and 93 transitions. [2022-02-15 13:01:32,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 13:01:32,959 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 [2022-02-15 13:01:32,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:32,960 INFO L225 Difference]: With dead ends: 51 [2022-02-15 13:01:32,960 INFO L226 Difference]: Without dead ends: 43 [2022-02-15 13:01:32,960 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 [2022-02-15 13:01:32,961 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 [2022-02-15 13:01:32,961 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] [2022-02-15 13:01:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-15 13:01:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-02-15 13:01:32,967 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) [2022-02-15 13:01:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2022-02-15 13:01:32,967 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 12 [2022-02-15 13:01:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:32,968 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2022-02-15 13:01:32,968 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) [2022-02-15 13:01:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2022-02-15 13:01:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 13:01:32,968 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:32,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:32,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 13:01:32,969 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:32,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1158712992, now seen corresponding path program 2 times [2022-02-15 13:01:32,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:32,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354943493] [2022-02-15 13:01:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:32,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:33,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:33,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354943493] [2022-02-15 13:01:33,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354943493] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:01:33,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:01:33,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:01:33,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637562164] [2022-02-15 13:01:33,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:01:33,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:01:33,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:33,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:01:33,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:01:33,011 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) [2022-02-15 13:01:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:33,058 INFO L93 Difference]: Finished difference Result 48 states and 93 transitions. [2022-02-15 13:01:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:01:33,058 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 [2022-02-15 13:01:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:33,059 INFO L225 Difference]: With dead ends: 48 [2022-02-15 13:01:33,059 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 13:01:33,059 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 [2022-02-15 13:01:33,060 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 [2022-02-15 13:01:33,062 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] [2022-02-15 13:01:33,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 13:01:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-02-15 13:01:33,066 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) [2022-02-15 13:01:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 85 transitions. [2022-02-15 13:01:33,066 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 85 transitions. Word has length 12 [2022-02-15 13:01:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:33,066 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 85 transitions. [2022-02-15 13:01:33,067 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) [2022-02-15 13:01:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 85 transitions. [2022-02-15 13:01:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:01:33,067 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:33,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:33,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 13:01:33,068 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:33,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:33,068 INFO L85 PathProgramCache]: Analyzing trace with hash 480777698, now seen corresponding path program 1 times [2022-02-15 13:01:33,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:33,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699451627] [2022-02-15 13:01:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:33,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:33,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:33,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699451627] [2022-02-15 13:01:33,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699451627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:33,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545172588] [2022-02-15 13:01:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:33,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:33,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:33,147 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) [2022-02-15 13:01:33,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-15 13:01:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:33,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:33,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:33,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:33,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545172588] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:33,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:33,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-02-15 13:01:33,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146788453] [2022-02-15 13:01:33,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:33,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:01:33,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:01:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:01:33,305 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) [2022-02-15 13:01:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:33,343 INFO L93 Difference]: Finished difference Result 107 states and 210 transitions. [2022-02-15 13:01:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 13:01:33,343 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 [2022-02-15 13:01:33,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:33,344 INFO L225 Difference]: With dead ends: 107 [2022-02-15 13:01:33,344 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 13:01:33,344 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 [2022-02-15 13:01:33,345 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 [2022-02-15 13:01:33,345 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] [2022-02-15 13:01:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 13:01:33,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2022-02-15 13:01:33,350 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) [2022-02-15 13:01:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 146 transitions. [2022-02-15 13:01:33,351 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 146 transitions. Word has length 14 [2022-02-15 13:01:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:33,351 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 146 transitions. [2022-02-15 13:01:33,352 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) [2022-02-15 13:01:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 146 transitions. [2022-02-15 13:01:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:01:33,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:33,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:33,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:33,569 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 [2022-02-15 13:01:33,569 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:33,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:33,570 INFO L85 PathProgramCache]: Analyzing trace with hash 110295842, now seen corresponding path program 2 times [2022-02-15 13:01:33,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:33,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573096197] [2022-02-15 13:01:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:33,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:01:33,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:33,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573096197] [2022-02-15 13:01:33,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573096197] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:01:33,605 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:01:33,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-15 13:01:33,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633465396] [2022-02-15 13:01:33,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:01:33,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:01:33,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:33,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:01:33,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:01:33,607 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) [2022-02-15 13:01:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:33,649 INFO L93 Difference]: Finished difference Result 127 states and 259 transitions. [2022-02-15 13:01:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 13:01:33,650 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 [2022-02-15 13:01:33,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:33,650 INFO L225 Difference]: With dead ends: 127 [2022-02-15 13:01:33,651 INFO L226 Difference]: Without dead ends: 118 [2022-02-15 13:01:33,651 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 [2022-02-15 13:01:33,651 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 [2022-02-15 13:01:33,652 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] [2022-02-15 13:01:33,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-15 13:01:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2022-02-15 13:01:33,657 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) [2022-02-15 13:01:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2022-02-15 13:01:33,658 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 14 [2022-02-15 13:01:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:33,658 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2022-02-15 13:01:33,658 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) [2022-02-15 13:01:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2022-02-15 13:01:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:01:33,659 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:33,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:33,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 13:01:33,659 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 523927072, now seen corresponding path program 3 times [2022-02-15 13:01:33,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:33,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582902902] [2022-02-15 13:01:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:33,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:33,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:33,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582902902] [2022-02-15 13:01:33,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582902902] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:33,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992482563] [2022-02-15 13:01:33,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:01:33,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:33,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:33,696 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) [2022-02-15 13:01:33,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-15 13:01:33,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:01:33,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:33,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:01:33,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:33,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:33,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992482563] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:33,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:33,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-15 13:01:33,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855163919] [2022-02-15 13:01:33,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:33,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:01:33,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:33,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:01:33,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:01:33,803 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) [2022-02-15 13:01:33,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:33,911 INFO L93 Difference]: Finished difference Result 176 states and 345 transitions. [2022-02-15 13:01:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:01:33,911 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 [2022-02-15 13:01:33,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:33,912 INFO L225 Difference]: With dead ends: 176 [2022-02-15 13:01:33,912 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 13:01:33,912 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 [2022-02-15 13:01:33,913 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 [2022-02-15 13:01:33,913 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] [2022-02-15 13:01:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 13:01:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 92. [2022-02-15 13:01:33,918 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) [2022-02-15 13:01:33,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 201 transitions. [2022-02-15 13:01:33,919 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 201 transitions. Word has length 16 [2022-02-15 13:01:33,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:33,919 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 201 transitions. [2022-02-15 13:01:33,919 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) [2022-02-15 13:01:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 201 transitions. [2022-02-15 13:01:33,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:01:33,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:33,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:33,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:34,135 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 [2022-02-15 13:01:34,136 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1858903004, now seen corresponding path program 4 times [2022-02-15 13:01:34,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:34,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471130289] [2022-02-15 13:01:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:34,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:34,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:34,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471130289] [2022-02-15 13:01:34,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471130289] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:34,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486159263] [2022-02-15 13:01:34,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:01:34,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:34,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:34,164 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) [2022-02-15 13:01:34,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-15 13:01:34,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:01:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:34,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:01:34,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:34,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:34,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486159263] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:34,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:34,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-15 13:01:34,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122629535] [2022-02-15 13:01:34,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:34,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:01:34,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:34,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:01:34,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:01:34,261 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) [2022-02-15 13:01:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:34,335 INFO L93 Difference]: Finished difference Result 161 states and 325 transitions. [2022-02-15 13:01:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:01:34,336 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 [2022-02-15 13:01:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:34,337 INFO L225 Difference]: With dead ends: 161 [2022-02-15 13:01:34,337 INFO L226 Difference]: Without dead ends: 150 [2022-02-15 13:01:34,337 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 [2022-02-15 13:01:34,337 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 [2022-02-15 13:01:34,338 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] [2022-02-15 13:01:34,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-15 13:01:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2022-02-15 13:01:34,342 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) [2022-02-15 13:01:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2022-02-15 13:01:34,343 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 16 [2022-02-15 13:01:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:34,343 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2022-02-15 13:01:34,343 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) [2022-02-15 13:01:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2022-02-15 13:01:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:01:34,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:34,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:34,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:34,559 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 [2022-02-15 13:01:34,560 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:34,560 INFO L85 PathProgramCache]: Analyzing trace with hash 794512882, now seen corresponding path program 5 times [2022-02-15 13:01:34,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:34,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028301119] [2022-02-15 13:01:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:34,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:34,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:34,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028301119] [2022-02-15 13:01:34,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028301119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:34,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297038284] [2022-02-15 13:01:34,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:01:34,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:34,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:34,588 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) [2022-02-15 13:01:34,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-15 13:01:34,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:01:34,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:34,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:01:34,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:34,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:34,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297038284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:34,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:34,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-15 13:01:34,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289757748] [2022-02-15 13:01:34,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:34,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:01:34,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:34,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:01:34,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:01:34,681 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) [2022-02-15 13:01:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:34,749 INFO L93 Difference]: Finished difference Result 154 states and 311 transitions. [2022-02-15 13:01:34,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:01:34,749 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 [2022-02-15 13:01:34,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:34,750 INFO L225 Difference]: With dead ends: 154 [2022-02-15 13:01:34,750 INFO L226 Difference]: Without dead ends: 154 [2022-02-15 13:01:34,750 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 [2022-02-15 13:01:34,751 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 [2022-02-15 13:01:34,751 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] [2022-02-15 13:01:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-15 13:01:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2022-02-15 13:01:34,755 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) [2022-02-15 13:01:34,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 237 transitions. [2022-02-15 13:01:34,756 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 237 transitions. Word has length 16 [2022-02-15 13:01:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:34,756 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 237 transitions. [2022-02-15 13:01:34,756 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) [2022-02-15 13:01:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 237 transitions. [2022-02-15 13:01:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:01:34,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:34,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:34,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:34,985 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 [2022-02-15 13:01:34,985 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:34,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:34,986 INFO L85 PathProgramCache]: Analyzing trace with hash 305629652, now seen corresponding path program 6 times [2022-02-15 13:01:34,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:34,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433413422] [2022-02-15 13:01:34,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:34,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:35,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:35,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433413422] [2022-02-15 13:01:35,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433413422] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:35,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884400692] [2022-02-15 13:01:35,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:01:35,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:35,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:35,017 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) [2022-02-15 13:01:35,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-15 13:01:35,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:01:35,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:35,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:01:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:35,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:35,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884400692] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:35,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:35,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-15 13:01:35,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421969210] [2022-02-15 13:01:35,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:35,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:01:35,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:35,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:01:35,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:01:35,093 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) [2022-02-15 13:01:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:35,143 INFO L93 Difference]: Finished difference Result 144 states and 290 transitions. [2022-02-15 13:01:35,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:01:35,144 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 [2022-02-15 13:01:35,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:35,144 INFO L225 Difference]: With dead ends: 144 [2022-02-15 13:01:35,144 INFO L226 Difference]: Without dead ends: 141 [2022-02-15 13:01:35,145 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 [2022-02-15 13:01:35,145 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 [2022-02-15 13:01:35,145 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] [2022-02-15 13:01:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-15 13:01:35,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2022-02-15 13:01:35,148 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) [2022-02-15 13:01:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2022-02-15 13:01:35,149 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 16 [2022-02-15 13:01:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:35,149 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2022-02-15 13:01:35,149 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) [2022-02-15 13:01:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2022-02-15 13:01:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:01:35,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:35,150 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:35,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:35,363 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 [2022-02-15 13:01:35,364 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:35,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:35,364 INFO L85 PathProgramCache]: Analyzing trace with hash 867656288, now seen corresponding path program 7 times [2022-02-15 13:01:35,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:35,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968156607] [2022-02-15 13:01:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:35,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:35,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:35,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968156607] [2022-02-15 13:01:35,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968156607] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:35,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123691852] [2022-02-15 13:01:35,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:01:35,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:35,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:35,392 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) [2022-02-15 13:01:35,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-15 13:01:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:01:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:35,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:35,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123691852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:35,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:35,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-15 13:01:35,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63917304] [2022-02-15 13:01:35,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:35,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:01:35,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:35,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:01:35,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:01:35,485 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) [2022-02-15 13:01:35,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:35,550 INFO L93 Difference]: Finished difference Result 195 states and 392 transitions. [2022-02-15 13:01:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:01:35,551 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 [2022-02-15 13:01:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:35,552 INFO L225 Difference]: With dead ends: 195 [2022-02-15 13:01:35,552 INFO L226 Difference]: Without dead ends: 195 [2022-02-15 13:01:35,552 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 [2022-02-15 13:01:35,552 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, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:01:35,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 17 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:01:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-02-15 13:01:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 122. [2022-02-15 13:01:35,556 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) [2022-02-15 13:01:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 266 transitions. [2022-02-15 13:01:35,556 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 266 transitions. Word has length 16 [2022-02-15 13:01:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:35,557 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 266 transitions. [2022-02-15 13:01:35,557 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) [2022-02-15 13:01:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 266 transitions. [2022-02-15 13:01:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:01:35,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:35,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:35,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:35,775 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 [2022-02-15 13:01:35,776 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:35,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1409681052, now seen corresponding path program 8 times [2022-02-15 13:01:35,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:35,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825071435] [2022-02-15 13:01:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:35,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:35,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:35,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825071435] [2022-02-15 13:01:35,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825071435] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:35,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843767849] [2022-02-15 13:01:35,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:01:35,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:35,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:35,799 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) [2022-02-15 13:01:35,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-15 13:01:35,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:01:35,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:35,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:01:35,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:35,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:35,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843767849] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:35,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:35,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-15 13:01:35,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134518510] [2022-02-15 13:01:35,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:35,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:01:35,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:35,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:01:35,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:01:35,890 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) [2022-02-15 13:01:35,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:35,950 INFO L93 Difference]: Finished difference Result 177 states and 366 transitions. [2022-02-15 13:01:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:01:35,951 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 [2022-02-15 13:01:35,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:35,952 INFO L225 Difference]: With dead ends: 177 [2022-02-15 13:01:35,952 INFO L226 Difference]: Without dead ends: 174 [2022-02-15 13:01:35,952 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 [2022-02-15 13:01:35,952 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 [2022-02-15 13:01:35,952 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] [2022-02-15 13:01:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-15 13:01:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2022-02-15 13:01:35,955 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) [2022-02-15 13:01:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 286 transitions. [2022-02-15 13:01:35,956 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 286 transitions. Word has length 16 [2022-02-15 13:01:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:35,956 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 286 transitions. [2022-02-15 13:01:35,956 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) [2022-02-15 13:01:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 286 transitions. [2022-02-15 13:01:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:01:35,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:35,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:35,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:36,157 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 [2022-02-15 13:01:36,158 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:36,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:36,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1755170378, now seen corresponding path program 9 times [2022-02-15 13:01:36,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:36,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179367962] [2022-02-15 13:01:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:36,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:36,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:36,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179367962] [2022-02-15 13:01:36,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179367962] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:36,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3248542] [2022-02-15 13:01:36,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:01:36,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:36,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:36,195 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) [2022-02-15 13:01:36,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-15 13:01:36,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:01:36,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:36,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:01:36,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:36,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:36,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3248542] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:36,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:36,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-15 13:01:36,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483235689] [2022-02-15 13:01:36,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:36,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:01:36,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:36,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:01:36,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:01:36,264 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) [2022-02-15 13:01:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:36,330 INFO L93 Difference]: Finished difference Result 184 states and 383 transitions. [2022-02-15 13:01:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:01:36,331 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 [2022-02-15 13:01:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:36,332 INFO L225 Difference]: With dead ends: 184 [2022-02-15 13:01:36,332 INFO L226 Difference]: Without dead ends: 184 [2022-02-15 13:01:36,332 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 [2022-02-15 13:01:36,332 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:01:36,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 24 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:01:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-15 13:01:36,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 130. [2022-02-15 13:01:36,335 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) [2022-02-15 13:01:36,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 290 transitions. [2022-02-15 13:01:36,336 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 290 transitions. Word has length 16 [2022-02-15 13:01:36,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:36,336 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 290 transitions. [2022-02-15 13:01:36,336 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) [2022-02-15 13:01:36,336 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 290 transitions. [2022-02-15 13:01:36,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:01:36,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:36,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:36,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:36,552 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 [2022-02-15 13:01:36,553 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:36,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2050913688, now seen corresponding path program 10 times [2022-02-15 13:01:36,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:36,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493470126] [2022-02-15 13:01:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:36,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:36,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:36,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493470126] [2022-02-15 13:01:36,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493470126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:36,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780855357] [2022-02-15 13:01:36,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:01:36,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:36,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:36,581 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) [2022-02-15 13:01:36,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-15 13:01:36,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:01:36,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:36,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:01:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:36,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:36,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780855357] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:36,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:36,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-15 13:01:36,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868121964] [2022-02-15 13:01:36,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:36,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:01:36,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:01:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:01:36,642 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) [2022-02-15 13:01:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:36,697 INFO L93 Difference]: Finished difference Result 192 states and 395 transitions. [2022-02-15 13:01:36,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:01:36,697 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 [2022-02-15 13:01:36,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:36,698 INFO L225 Difference]: With dead ends: 192 [2022-02-15 13:01:36,698 INFO L226 Difference]: Without dead ends: 189 [2022-02-15 13:01:36,698 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 [2022-02-15 13:01:36,699 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 [2022-02-15 13:01:36,699 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] [2022-02-15 13:01:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-15 13:01:36,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 130. [2022-02-15 13:01:36,702 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) [2022-02-15 13:01:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 289 transitions. [2022-02-15 13:01:36,702 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 289 transitions. Word has length 16 [2022-02-15 13:01:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:36,702 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 289 transitions. [2022-02-15 13:01:36,702 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) [2022-02-15 13:01:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 289 transitions. [2022-02-15 13:01:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:01:36,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:36,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:36,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:36,918 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 [2022-02-15 13:01:36,919 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:36,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:36,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1466711538, now seen corresponding path program 11 times [2022-02-15 13:01:36,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:36,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685515444] [2022-02-15 13:01:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:36,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:36,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:36,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685515444] [2022-02-15 13:01:36,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685515444] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:36,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056934254] [2022-02-15 13:01:36,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:01:36,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:36,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:36,943 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) [2022-02-15 13:01:36,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-15 13:01:36,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:01:36,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:36,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:01:36,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:36,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:37,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056934254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:37,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:37,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-15 13:01:37,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292299771] [2022-02-15 13:01:37,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:37,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:01:37,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:37,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:01:37,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:01:37,015 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) [2022-02-15 13:01:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:37,090 INFO L93 Difference]: Finished difference Result 173 states and 357 transitions. [2022-02-15 13:01:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:01:37,090 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 [2022-02-15 13:01:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:37,091 INFO L225 Difference]: With dead ends: 173 [2022-02-15 13:01:37,091 INFO L226 Difference]: Without dead ends: 173 [2022-02-15 13:01:37,091 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 [2022-02-15 13:01:37,091 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 [2022-02-15 13:01:37,092 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] [2022-02-15 13:01:37,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-15 13:01:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2022-02-15 13:01:37,094 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) [2022-02-15 13:01:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 276 transitions. [2022-02-15 13:01:37,095 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 276 transitions. Word has length 16 [2022-02-15 13:01:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:37,095 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 276 transitions. [2022-02-15 13:01:37,095 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) [2022-02-15 13:01:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 276 transitions. [2022-02-15 13:01:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:01:37,095 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:37,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:37,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:37,324 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 [2022-02-15 13:01:37,324 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:37,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1706198030, now seen corresponding path program 12 times [2022-02-15 13:01:37,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:37,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751504778] [2022-02-15 13:01:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:37,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:37,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:37,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751504778] [2022-02-15 13:01:37,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751504778] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:37,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579909793] [2022-02-15 13:01:37,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:01:37,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:37,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:37,345 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) [2022-02-15 13:01:37,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-15 13:01:37,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:01:37,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:37,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:01:37,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:37,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:37,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579909793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:37,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:37,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-15 13:01:37,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706029043] [2022-02-15 13:01:37,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:37,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:01:37,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:01:37,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:01:37,413 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) [2022-02-15 13:01:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:37,473 INFO L93 Difference]: Finished difference Result 188 states and 378 transitions. [2022-02-15 13:01:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:01:37,474 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 [2022-02-15 13:01:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:37,475 INFO L225 Difference]: With dead ends: 188 [2022-02-15 13:01:37,475 INFO L226 Difference]: Without dead ends: 179 [2022-02-15 13:01:37,475 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 [2022-02-15 13:01:37,475 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, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:01:37,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 14 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:01:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-15 13:01:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 132. [2022-02-15 13:01:37,478 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) [2022-02-15 13:01:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2022-02-15 13:01:37,479 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 16 [2022-02-15 13:01:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:37,479 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2022-02-15 13:01:37,479 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) [2022-02-15 13:01:37,479 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2022-02-15 13:01:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:01:37,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:37,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:37,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:37,695 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 [2022-02-15 13:01:37,696 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:37,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:37,696 INFO L85 PathProgramCache]: Analyzing trace with hash 952939746, now seen corresponding path program 13 times [2022-02-15 13:01:37,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:37,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168377946] [2022-02-15 13:01:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:37,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:37,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:37,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168377946] [2022-02-15 13:01:37,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168377946] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:37,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301464107] [2022-02-15 13:01:37,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:01:37,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:37,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:37,733 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) [2022-02-15 13:01:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:37,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:01:37,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:37,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-15 13:01:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:37,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:37,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301464107] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:37,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:37,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-02-15 13:01:37,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898835628] [2022-02-15 13:01:37,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:37,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:01:37,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:37,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:01:37,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:01:37,871 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) [2022-02-15 13:01:37,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:37,931 INFO L93 Difference]: Finished difference Result 239 states and 502 transitions. [2022-02-15 13:01:37,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:01:37,932 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 [2022-02-15 13:01:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:37,933 INFO L225 Difference]: With dead ends: 239 [2022-02-15 13:01:37,933 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 13:01:37,933 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 [2022-02-15 13:01:37,933 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:01:37,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 26 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:01:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 13:01:37,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 177. [2022-02-15 13:01:37,937 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) [2022-02-15 13:01:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 397 transitions. [2022-02-15 13:01:37,937 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 397 transitions. Word has length 18 [2022-02-15 13:01:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:37,938 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 397 transitions. [2022-02-15 13:01:37,938 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) [2022-02-15 13:01:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 397 transitions. [2022-02-15 13:01:37,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:01:37,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:37,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:37,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:38,139 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 [2022-02-15 13:01:38,139 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:38,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:38,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1031679842, now seen corresponding path program 14 times [2022-02-15 13:01:38,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:38,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696457442] [2022-02-15 13:01:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:38,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:01:38,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:38,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696457442] [2022-02-15 13:01:38,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696457442] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:38,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398756318] [2022-02-15 13:01:38,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:01:38,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:38,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:38,178 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) [2022-02-15 13:01:38,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-15 13:01:38,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:01:38,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:38,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:01:38,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:38,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:38,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398756318] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:38,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:38,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 11 [2022-02-15 13:01:38,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184900450] [2022-02-15 13:01:38,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:38,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:01:38,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:01:38,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:01:38,415 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) [2022-02-15 13:01:38,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:38,640 INFO L93 Difference]: Finished difference Result 461 states and 960 transitions. [2022-02-15 13:01:38,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:01:38,640 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 [2022-02-15 13:01:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:38,641 INFO L225 Difference]: With dead ends: 461 [2022-02-15 13:01:38,642 INFO L226 Difference]: Without dead ends: 443 [2022-02-15 13:01:38,642 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 [2022-02-15 13:01:38,642 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 [2022-02-15 13:01:38,642 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] [2022-02-15 13:01:38,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-02-15 13:01:38,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 222. [2022-02-15 13:01:38,647 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) [2022-02-15 13:01:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 510 transitions. [2022-02-15 13:01:38,648 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 510 transitions. Word has length 18 [2022-02-15 13:01:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:38,648 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 510 transitions. [2022-02-15 13:01:38,648 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) [2022-02-15 13:01:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 510 transitions. [2022-02-15 13:01:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:01:38,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:38,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:38,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:38,863 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 [2022-02-15 13:01:38,864 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash 907963746, now seen corresponding path program 15 times [2022-02-15 13:01:38,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:38,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958306539] [2022-02-15 13:01:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:38,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:01:38,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:38,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958306539] [2022-02-15 13:01:38,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958306539] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:38,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131672308] [2022-02-15 13:01:38,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:01:38,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:38,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:38,903 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) [2022-02-15 13:01:38,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-15 13:01:38,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:01:38,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:01:38,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:01:38,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:01:39,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131672308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:39,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:39,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-02-15 13:01:39,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554005775] [2022-02-15 13:01:39,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:39,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:01:39,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:39,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:01:39,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:01:39,017 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) [2022-02-15 13:01:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:39,071 INFO L93 Difference]: Finished difference Result 325 states and 717 transitions. [2022-02-15 13:01:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:01:39,071 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 [2022-02-15 13:01:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:39,072 INFO L225 Difference]: With dead ends: 325 [2022-02-15 13:01:39,072 INFO L226 Difference]: Without dead ends: 316 [2022-02-15 13:01:39,072 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 [2022-02-15 13:01:39,073 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 [2022-02-15 13:01:39,073 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] [2022-02-15 13:01:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-15 13:01:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 263. [2022-02-15 13:01:39,078 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) [2022-02-15 13:01:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 612 transitions. [2022-02-15 13:01:39,080 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 612 transitions. Word has length 18 [2022-02-15 13:01:39,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:39,080 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 612 transitions. [2022-02-15 13:01:39,081 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) [2022-02-15 13:01:39,081 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 612 transitions. [2022-02-15 13:01:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:39,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:39,081 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:39,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-15 13:01:39,298 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 [2022-02-15 13:01:39,298 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1599393312, now seen corresponding path program 16 times [2022-02-15 13:01:39,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:39,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265204681] [2022-02-15 13:01:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:39,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:39,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:39,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265204681] [2022-02-15 13:01:39,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265204681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:39,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124848757] [2022-02-15 13:01:39,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:01:39,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:39,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:39,344 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) [2022-02-15 13:01:39,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-15 13:01:39,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:01:39,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:39,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:39,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:39,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:39,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124848757] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:39,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:39,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-15 13:01:39,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094272261] [2022-02-15 13:01:39,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:39,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:01:39,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:39,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:01:39,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:01:39,442 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) [2022-02-15 13:01:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:39,567 INFO L93 Difference]: Finished difference Result 408 states and 863 transitions. [2022-02-15 13:01:39,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:01:39,567 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 [2022-02-15 13:01:39,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:39,569 INFO L225 Difference]: With dead ends: 408 [2022-02-15 13:01:39,569 INFO L226 Difference]: Without dead ends: 408 [2022-02-15 13:01:39,569 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 [2022-02-15 13:01:39,569 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 [2022-02-15 13:01:39,570 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] [2022-02-15 13:01:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-02-15 13:01:39,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 247. [2022-02-15 13:01:39,578 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) [2022-02-15 13:01:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 572 transitions. [2022-02-15 13:01:39,579 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 572 transitions. Word has length 20 [2022-02-15 13:01:39,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:39,579 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 572 transitions. [2022-02-15 13:01:39,579 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) [2022-02-15 13:01:39,580 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 572 transitions. [2022-02-15 13:01:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:39,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:39,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:39,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:39,795 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 [2022-02-15 13:01:39,796 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:39,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:39,796 INFO L85 PathProgramCache]: Analyzing trace with hash 917259044, now seen corresponding path program 17 times [2022-02-15 13:01:39,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:39,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835884627] [2022-02-15 13:01:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:39,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:39,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:39,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835884627] [2022-02-15 13:01:39,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835884627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:39,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820586129] [2022-02-15 13:01:39,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:01:39,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:39,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:39,834 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) [2022-02-15 13:01:39,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-15 13:01:39,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:01:39,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:39,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:39,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:39,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820586129] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:39,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:39,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-15 13:01:39,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183661122] [2022-02-15 13:01:39,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:39,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:01:39,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:39,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:01:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:01:39,926 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) [2022-02-15 13:01:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:40,015 INFO L93 Difference]: Finished difference Result 378 states and 807 transitions. [2022-02-15 13:01:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:01:40,015 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 [2022-02-15 13:01:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:40,018 INFO L225 Difference]: With dead ends: 378 [2022-02-15 13:01:40,018 INFO L226 Difference]: Without dead ends: 361 [2022-02-15 13:01:40,018 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 [2022-02-15 13:01:40,018 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 [2022-02-15 13:01:40,018 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] [2022-02-15 13:01:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-15 13:01:40,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 274. [2022-02-15 13:01:40,024 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) [2022-02-15 13:01:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 630 transitions. [2022-02-15 13:01:40,025 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 630 transitions. Word has length 20 [2022-02-15 13:01:40,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:40,025 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 630 transitions. [2022-02-15 13:01:40,025 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) [2022-02-15 13:01:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 630 transitions. [2022-02-15 13:01:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:40,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:40,027 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:40,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:40,235 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 [2022-02-15 13:01:40,235 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:40,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash -699439250, now seen corresponding path program 18 times [2022-02-15 13:01:40,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:40,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056545475] [2022-02-15 13:01:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:40,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:40,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:40,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056545475] [2022-02-15 13:01:40,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056545475] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:40,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824616248] [2022-02-15 13:01:40,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:01:40,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:40,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:40,264 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) [2022-02-15 13:01:40,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-15 13:01:40,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:01:40,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:40,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:40,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:40,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:40,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824616248] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:40,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:40,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-15 13:01:40,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102614129] [2022-02-15 13:01:40,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:40,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:01:40,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:40,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:01:40,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:01:40,356 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) [2022-02-15 13:01:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:40,447 INFO L93 Difference]: Finished difference Result 361 states and 773 transitions. [2022-02-15 13:01:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:01:40,448 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 [2022-02-15 13:01:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:40,449 INFO L225 Difference]: With dead ends: 361 [2022-02-15 13:01:40,449 INFO L226 Difference]: Without dead ends: 361 [2022-02-15 13:01:40,449 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 [2022-02-15 13:01:40,450 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 69 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-15 13:01:40,450 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] [2022-02-15 13:01:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-15 13:01:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 253. [2022-02-15 13:01:40,455 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) [2022-02-15 13:01:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 570 transitions. [2022-02-15 13:01:40,455 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 570 transitions. Word has length 20 [2022-02-15 13:01:40,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:40,456 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 570 transitions. [2022-02-15 13:01:40,456 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) [2022-02-15 13:01:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 570 transitions. [2022-02-15 13:01:40,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:40,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:40,456 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:40,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:40,673 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 [2022-02-15 13:01:40,673 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:40,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:40,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1188322480, now seen corresponding path program 19 times [2022-02-15 13:01:40,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:40,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691405280] [2022-02-15 13:01:40,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:40,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:40,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:40,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691405280] [2022-02-15 13:01:40,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691405280] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:40,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324789657] [2022-02-15 13:01:40,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:01:40,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:40,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:40,700 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) [2022-02-15 13:01:40,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-15 13:01:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:40,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:40,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:40,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:40,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324789657] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:40,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:40,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-15 13:01:40,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651990106] [2022-02-15 13:01:40,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:40,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:01:40,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:40,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:01:40,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:01:40,801 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) [2022-02-15 13:01:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:40,873 INFO L93 Difference]: Finished difference Result 308 states and 661 transitions. [2022-02-15 13:01:40,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:01:40,874 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 [2022-02-15 13:01:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:40,875 INFO L225 Difference]: With dead ends: 308 [2022-02-15 13:01:40,875 INFO L226 Difference]: Without dead ends: 305 [2022-02-15 13:01:40,875 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 [2022-02-15 13:01:40,875 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 [2022-02-15 13:01:40,876 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] [2022-02-15 13:01:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-15 13:01:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 253. [2022-02-15 13:01:40,880 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) [2022-02-15 13:01:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 569 transitions. [2022-02-15 13:01:40,881 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 569 transitions. Word has length 20 [2022-02-15 13:01:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:40,881 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 569 transitions. [2022-02-15 13:01:40,881 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) [2022-02-15 13:01:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 569 transitions. [2022-02-15 13:01:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:40,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:40,881 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:40,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:41,098 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 [2022-02-15 13:01:41,098 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:41,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:41,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1554417312, now seen corresponding path program 20 times [2022-02-15 13:01:41,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:41,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28657910] [2022-02-15 13:01:41,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:41,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:41,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:41,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28657910] [2022-02-15 13:01:41,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28657910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:41,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492718132] [2022-02-15 13:01:41,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:01:41,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:41,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:41,129 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) [2022-02-15 13:01:41,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-15 13:01:41,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:01:41,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:41,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:41,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:41,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:41,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492718132] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:41,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:41,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-15 13:01:41,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758882584] [2022-02-15 13:01:41,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:41,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:01:41,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:41,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:01:41,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:01:41,222 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) [2022-02-15 13:01:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:41,326 INFO L93 Difference]: Finished difference Result 420 states and 883 transitions. [2022-02-15 13:01:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:01:41,327 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 [2022-02-15 13:01:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:41,328 INFO L225 Difference]: With dead ends: 420 [2022-02-15 13:01:41,328 INFO L226 Difference]: Without dead ends: 420 [2022-02-15 13:01:41,329 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 [2022-02-15 13:01:41,329 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 [2022-02-15 13:01:41,329 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] [2022-02-15 13:01:41,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-02-15 13:01:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 271. [2022-02-15 13:01:41,335 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) [2022-02-15 13:01:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 618 transitions. [2022-02-15 13:01:41,336 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 618 transitions. Word has length 20 [2022-02-15 13:01:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:41,336 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 618 transitions. [2022-02-15 13:01:41,336 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) [2022-02-15 13:01:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 618 transitions. [2022-02-15 13:01:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:41,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:41,337 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:41,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:41,553 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 [2022-02-15 13:01:41,554 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash -722920028, now seen corresponding path program 21 times [2022-02-15 13:01:41,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:41,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529131191] [2022-02-15 13:01:41,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:41,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:41,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:41,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529131191] [2022-02-15 13:01:41,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529131191] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:41,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306320240] [2022-02-15 13:01:41,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:01:41,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:41,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:41,598 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) [2022-02-15 13:01:41,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-15 13:01:41,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:01:41,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:41,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:41,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:01:41,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:01:41,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306320240] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:41,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:41,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-02-15 13:01:41,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512107412] [2022-02-15 13:01:41,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:41,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:01:41,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:41,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:01:41,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:01:41,809 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) [2022-02-15 13:01:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:42,199 INFO L93 Difference]: Finished difference Result 387 states and 834 transitions. [2022-02-15 13:01:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 13:01:42,199 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 [2022-02-15 13:01:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:42,200 INFO L225 Difference]: With dead ends: 387 [2022-02-15 13:01:42,200 INFO L226 Difference]: Without dead ends: 301 [2022-02-15 13:01:42,201 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 [2022-02-15 13:01:42,201 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 [2022-02-15 13:01:42,201 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] [2022-02-15 13:01:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-02-15 13:01:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 233. [2022-02-15 13:01:42,205 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) [2022-02-15 13:01:42,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 532 transitions. [2022-02-15 13:01:42,206 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 532 transitions. Word has length 20 [2022-02-15 13:01:42,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:42,206 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 532 transitions. [2022-02-15 13:01:42,206 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) [2022-02-15 13:01:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 532 transitions. [2022-02-15 13:01:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:42,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:42,207 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:42,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:42,423 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 [2022-02-15 13:01:42,423 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:42,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1557292584, now seen corresponding path program 22 times [2022-02-15 13:01:42,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:42,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505359208] [2022-02-15 13:01:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:42,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:42,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:42,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505359208] [2022-02-15 13:01:42,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505359208] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:42,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405877740] [2022-02-15 13:01:42,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:01:42,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:42,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:42,460 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) [2022-02-15 13:01:42,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-15 13:01:42,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:01:42,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:42,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:42,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:42,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:42,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405877740] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:42,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:42,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-15 13:01:42,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469020138] [2022-02-15 13:01:42,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:42,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:01:42,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:42,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:01:42,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:01:42,544 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) [2022-02-15 13:01:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:42,618 INFO L93 Difference]: Finished difference Result 322 states and 671 transitions. [2022-02-15 13:01:42,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:01:42,618 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 [2022-02-15 13:01:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:42,619 INFO L225 Difference]: With dead ends: 322 [2022-02-15 13:01:42,619 INFO L226 Difference]: Without dead ends: 316 [2022-02-15 13:01:42,620 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 [2022-02-15 13:01:42,620 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 [2022-02-15 13:01:42,620 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] [2022-02-15 13:01:42,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-15 13:01:42,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 207. [2022-02-15 13:01:42,624 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) [2022-02-15 13:01:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 468 transitions. [2022-02-15 13:01:42,624 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 468 transitions. Word has length 20 [2022-02-15 13:01:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:42,625 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 468 transitions. [2022-02-15 13:01:42,625 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) [2022-02-15 13:01:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 468 transitions. [2022-02-15 13:01:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:42,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:42,625 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:42,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:42,840 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 [2022-02-15 13:01:42,841 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:42,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:42,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1019437006, now seen corresponding path program 23 times [2022-02-15 13:01:42,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:42,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167266529] [2022-02-15 13:01:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:42,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:42,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:42,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167266529] [2022-02-15 13:01:42,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167266529] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:42,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44483934] [2022-02-15 13:01:42,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:01:42,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:42,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:42,892 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) [2022-02-15 13:01:42,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-15 13:01:42,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:01:42,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:42,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:42,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:42,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44483934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:42,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:42,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-15 13:01:42,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576062313] [2022-02-15 13:01:42,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:42,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:01:42,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:01:42,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:01:42,975 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) [2022-02-15 13:01:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:43,060 INFO L93 Difference]: Finished difference Result 278 states and 577 transitions. [2022-02-15 13:01:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:01:43,061 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 [2022-02-15 13:01:43,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:43,062 INFO L225 Difference]: With dead ends: 278 [2022-02-15 13:01:43,062 INFO L226 Difference]: Without dead ends: 269 [2022-02-15 13:01:43,062 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 [2022-02-15 13:01:43,062 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-02-15 13:01:43,062 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] [2022-02-15 13:01:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-15 13:01:43,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 210. [2022-02-15 13:01:43,066 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) [2022-02-15 13:01:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 474 transitions. [2022-02-15 13:01:43,066 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 474 transitions. Word has length 20 [2022-02-15 13:01:43,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:43,066 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 474 transitions. [2022-02-15 13:01:43,066 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) [2022-02-15 13:01:43,067 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 474 transitions. [2022-02-15 13:01:43,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:43,067 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:43,067 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:43,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:43,282 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 [2022-02-15 13:01:43,283 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:43,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1223925326, now seen corresponding path program 24 times [2022-02-15 13:01:43,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:43,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446823009] [2022-02-15 13:01:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:43,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:43,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:43,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446823009] [2022-02-15 13:01:43,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446823009] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:43,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420582738] [2022-02-15 13:01:43,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:01:43,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:43,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:43,316 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) [2022-02-15 13:01:43,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-15 13:01:43,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:01:43,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:43,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:43,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:43,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:43,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420582738] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:43,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:43,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-15 13:01:43,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982597130] [2022-02-15 13:01:43,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:43,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:01:43,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:43,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:01:43,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:01:43,411 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) [2022-02-15 13:01:43,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:43,501 INFO L93 Difference]: Finished difference Result 254 states and 535 transitions. [2022-02-15 13:01:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:01:43,502 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 [2022-02-15 13:01:43,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:43,502 INFO L225 Difference]: With dead ends: 254 [2022-02-15 13:01:43,503 INFO L226 Difference]: Without dead ends: 245 [2022-02-15 13:01:43,503 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 [2022-02-15 13:01:43,503 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 [2022-02-15 13:01:43,503 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] [2022-02-15 13:01:43,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-15 13:01:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 209. [2022-02-15 13:01:43,506 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) [2022-02-15 13:01:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 467 transitions. [2022-02-15 13:01:43,507 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 467 transitions. Word has length 20 [2022-02-15 13:01:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:43,507 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 467 transitions. [2022-02-15 13:01:43,507 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) [2022-02-15 13:01:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 467 transitions. [2022-02-15 13:01:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:43,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:43,508 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:43,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:43,723 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 [2022-02-15 13:01:43,724 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1372633952, now seen corresponding path program 25 times [2022-02-15 13:01:43,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:43,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998068781] [2022-02-15 13:01:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:43,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:43,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:43,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998068781] [2022-02-15 13:01:43,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998068781] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:43,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144648167] [2022-02-15 13:01:43,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:01:43,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:43,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:43,751 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) [2022-02-15 13:01:43,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-15 13:01:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:43,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:43,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:43,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144648167] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:43,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:43,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-15 13:01:43,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881338405] [2022-02-15 13:01:43,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:43,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:01:43,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:43,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:01:43,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:01:43,844 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) [2022-02-15 13:01:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:43,925 INFO L93 Difference]: Finished difference Result 310 states and 646 transitions. [2022-02-15 13:01:43,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:01:43,925 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 [2022-02-15 13:01:43,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:43,926 INFO L225 Difference]: With dead ends: 310 [2022-02-15 13:01:43,926 INFO L226 Difference]: Without dead ends: 307 [2022-02-15 13:01:43,927 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 [2022-02-15 13:01:43,927 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 [2022-02-15 13:01:43,928 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] [2022-02-15 13:01:43,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-02-15 13:01:43,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 222. [2022-02-15 13:01:43,931 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) [2022-02-15 13:01:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 503 transitions. [2022-02-15 13:01:43,932 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 503 transitions. Word has length 20 [2022-02-15 13:01:43,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:43,932 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 503 transitions. [2022-02-15 13:01:43,932 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) [2022-02-15 13:01:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 503 transitions. [2022-02-15 13:01:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:43,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:43,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:43,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:44,147 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 [2022-02-15 13:01:44,147 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:44,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:44,148 INFO L85 PathProgramCache]: Analyzing trace with hash 299506678, now seen corresponding path program 26 times [2022-02-15 13:01:44,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:44,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698688695] [2022-02-15 13:01:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:44,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:44,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:44,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698688695] [2022-02-15 13:01:44,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698688695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:44,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357854669] [2022-02-15 13:01:44,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:01:44,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:44,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:44,176 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) [2022-02-15 13:01:44,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-15 13:01:44,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:01:44,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:44,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:44,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:44,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:44,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357854669] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:44,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:44,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-15 13:01:44,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476853048] [2022-02-15 13:01:44,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:44,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:01:44,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:44,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:01:44,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:01:44,263 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) [2022-02-15 13:01:44,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:44,341 INFO L93 Difference]: Finished difference Result 330 states and 707 transitions. [2022-02-15 13:01:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:01:44,342 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 [2022-02-15 13:01:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:44,343 INFO L225 Difference]: With dead ends: 330 [2022-02-15 13:01:44,343 INFO L226 Difference]: Without dead ends: 330 [2022-02-15 13:01:44,343 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 [2022-02-15 13:01:44,343 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 [2022-02-15 13:01:44,343 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] [2022-02-15 13:01:44,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-02-15 13:01:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 238. [2022-02-15 13:01:44,347 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) [2022-02-15 13:01:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 546 transitions. [2022-02-15 13:01:44,348 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 546 transitions. Word has length 20 [2022-02-15 13:01:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:44,348 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 546 transitions. [2022-02-15 13:01:44,348 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) [2022-02-15 13:01:44,348 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 546 transitions. [2022-02-15 13:01:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:44,348 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:44,349 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:44,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:44,563 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 [2022-02-15 13:01:44,564 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash -189376552, now seen corresponding path program 27 times [2022-02-15 13:01:44,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:44,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032858642] [2022-02-15 13:01:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:44,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:44,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:44,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032858642] [2022-02-15 13:01:44,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032858642] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:44,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095596851] [2022-02-15 13:01:44,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:01:44,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:44,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:44,588 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) [2022-02-15 13:01:44,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-15 13:01:44,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:01:44,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:44,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:44,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:44,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:44,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095596851] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:44,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:44,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-15 13:01:44,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360371052] [2022-02-15 13:01:44,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:44,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:01:44,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:44,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:01:44,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:01:44,687 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) [2022-02-15 13:01:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:44,755 INFO L93 Difference]: Finished difference Result 322 states and 681 transitions. [2022-02-15 13:01:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:01:44,756 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 [2022-02-15 13:01:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:44,757 INFO L225 Difference]: With dead ends: 322 [2022-02-15 13:01:44,757 INFO L226 Difference]: Without dead ends: 319 [2022-02-15 13:01:44,757 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 [2022-02-15 13:01:44,758 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 [2022-02-15 13:01:44,758 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] [2022-02-15 13:01:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-02-15 13:01:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 238. [2022-02-15 13:01:44,762 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) [2022-02-15 13:01:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 545 transitions. [2022-02-15 13:01:44,762 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 545 transitions. Word has length 20 [2022-02-15 13:01:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:44,763 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 545 transitions. [2022-02-15 13:01:44,763 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) [2022-02-15 13:01:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 545 transitions. [2022-02-15 13:01:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:44,763 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:44,763 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:44,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:44,969 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 [2022-02-15 13:01:44,969 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:44,970 INFO L85 PathProgramCache]: Analyzing trace with hash -773578702, now seen corresponding path program 28 times [2022-02-15 13:01:44,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:44,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072008257] [2022-02-15 13:01:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:44,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:45,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:45,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072008257] [2022-02-15 13:01:45,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072008257] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:45,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631442424] [2022-02-15 13:01:45,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:01:45,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:45,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:45,003 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) [2022-02-15 13:01:45,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-15 13:01:45,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:01:45,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:45,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:45,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:45,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:45,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631442424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:45,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:45,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-02-15 13:01:45,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971103613] [2022-02-15 13:01:45,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:45,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:01:45,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:45,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:01:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:01:45,093 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) [2022-02-15 13:01:45,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:45,192 INFO L93 Difference]: Finished difference Result 348 states and 748 transitions. [2022-02-15 13:01:45,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:01:45,193 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 [2022-02-15 13:01:45,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:45,194 INFO L225 Difference]: With dead ends: 348 [2022-02-15 13:01:45,194 INFO L226 Difference]: Without dead ends: 348 [2022-02-15 13:01:45,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:01:45,194 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 [2022-02-15 13:01:45,194 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] [2022-02-15 13:01:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-15 13:01:45,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 224. [2022-02-15 13:01:45,198 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) [2022-02-15 13:01:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 505 transitions. [2022-02-15 13:01:45,199 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 505 transitions. Word has length 20 [2022-02-15 13:01:45,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:45,199 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 505 transitions. [2022-02-15 13:01:45,199 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) [2022-02-15 13:01:45,199 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 505 transitions. [2022-02-15 13:01:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:45,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:45,199 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:45,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:45,415 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 [2022-02-15 13:01:45,415 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:45,416 INFO L85 PathProgramCache]: Analyzing trace with hash 348479026, now seen corresponding path program 29 times [2022-02-15 13:01:45,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:45,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599023053] [2022-02-15 13:01:45,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:45,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:45,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:45,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599023053] [2022-02-15 13:01:45,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599023053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:45,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709288351] [2022-02-15 13:01:45,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:01:45,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:45,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:45,446 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) [2022-02-15 13:01:45,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:01:45,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:45,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:45,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:45,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-15 13:01:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:45,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:45,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709288351] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:45,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:45,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-02-15 13:01:45,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896024851] [2022-02-15 13:01:45,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:45,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:01:45,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:45,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:01:45,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:01:45,535 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) [2022-02-15 13:01:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:45,602 INFO L93 Difference]: Finished difference Result 329 states and 681 transitions. [2022-02-15 13:01:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:01:45,602 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 [2022-02-15 13:01:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:45,603 INFO L225 Difference]: With dead ends: 329 [2022-02-15 13:01:45,604 INFO L226 Difference]: Without dead ends: 320 [2022-02-15 13:01:45,604 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 [2022-02-15 13:01:45,604 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 [2022-02-15 13:01:45,604 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] [2022-02-15 13:01:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-15 13:01:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 224. [2022-02-15 13:01:45,608 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) [2022-02-15 13:01:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 503 transitions. [2022-02-15 13:01:45,608 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 503 transitions. Word has length 20 [2022-02-15 13:01:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:45,608 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 503 transitions. [2022-02-15 13:01:45,608 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) [2022-02-15 13:01:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 503 transitions. [2022-02-15 13:01:45,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:45,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:45,609 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:45,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:45,819 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 [2022-02-15 13:01:45,819 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:45,820 INFO L85 PathProgramCache]: Analyzing trace with hash 971705334, now seen corresponding path program 30 times [2022-02-15 13:01:45,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:45,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19953116] [2022-02-15 13:01:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:45,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:45,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:45,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19953116] [2022-02-15 13:01:45,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19953116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:45,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894872720] [2022-02-15 13:01:45,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:01:45,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:45,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:45,858 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) [2022-02-15 13:01:45,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-15 13:01:45,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:01:45,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:45,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:45,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:45,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:45,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894872720] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:45,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:45,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-15 13:01:45,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217591298] [2022-02-15 13:01:45,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:45,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:01:45,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:45,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:01:45,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:01:45,962 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) [2022-02-15 13:01:46,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:46,065 INFO L93 Difference]: Finished difference Result 302 states and 629 transitions. [2022-02-15 13:01:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:01:46,066 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 [2022-02-15 13:01:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:46,067 INFO L225 Difference]: With dead ends: 302 [2022-02-15 13:01:46,067 INFO L226 Difference]: Without dead ends: 299 [2022-02-15 13:01:46,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:01:46,067 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 47 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-15 13:01:46,068 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] [2022-02-15 13:01:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-15 13:01:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 208. [2022-02-15 13:01:46,071 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) [2022-02-15 13:01:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 466 transitions. [2022-02-15 13:01:46,071 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 466 transitions. Word has length 20 [2022-02-15 13:01:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:46,071 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 466 transitions. [2022-02-15 13:01:46,071 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) [2022-02-15 13:01:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 466 transitions. [2022-02-15 13:01:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:01:46,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:46,072 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:46,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:46,287 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 [2022-02-15 13:01:46,287 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:46,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1875608010, now seen corresponding path program 31 times [2022-02-15 13:01:46,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:46,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837034613] [2022-02-15 13:01:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:46,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:46,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:46,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837034613] [2022-02-15 13:01:46,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837034613] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:46,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998221427] [2022-02-15 13:01:46,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:01:46,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:46,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:46,325 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) [2022-02-15 13:01:46,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-15 13:01:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:46,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:46,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:46,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:46,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998221427] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:46,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:46,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-15 13:01:46,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9281273] [2022-02-15 13:01:46,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:46,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:01:46,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:46,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:01:46,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:01:46,393 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) [2022-02-15 13:01:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:46,479 INFO L93 Difference]: Finished difference Result 298 states and 611 transitions. [2022-02-15 13:01:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:01:46,479 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 [2022-02-15 13:01:46,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:46,480 INFO L225 Difference]: With dead ends: 298 [2022-02-15 13:01:46,480 INFO L226 Difference]: Without dead ends: 283 [2022-02-15 13:01:46,480 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 [2022-02-15 13:01:46,481 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 73 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-02-15 13:01:46,481 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] [2022-02-15 13:01:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-15 13:01:46,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 214. [2022-02-15 13:01:46,484 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) [2022-02-15 13:01:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 477 transitions. [2022-02-15 13:01:46,484 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 477 transitions. Word has length 20 [2022-02-15 13:01:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:46,485 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 477 transitions. [2022-02-15 13:01:46,485 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) [2022-02-15 13:01:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 477 transitions. [2022-02-15 13:01:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:01:46,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:46,485 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:46,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:46,685 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 [2022-02-15 13:01:46,686 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:46,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2067147052, now seen corresponding path program 32 times [2022-02-15 13:01:46,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:46,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36724545] [2022-02-15 13:01:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:46,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:46,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:46,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36724545] [2022-02-15 13:01:46,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36724545] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:46,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240152612] [2022-02-15 13:01:46,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:01:46,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:46,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:46,728 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) [2022-02-15 13:01:46,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-15 13:01:46,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:01:46,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:46,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:01:46,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:46,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:47,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240152612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:47,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:47,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 12 [2022-02-15 13:01:47,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159065171] [2022-02-15 13:01:47,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:47,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:01:47,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:47,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:01:47,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:01:47,022 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) [2022-02-15 13:01:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:47,256 INFO L93 Difference]: Finished difference Result 359 states and 739 transitions. [2022-02-15 13:01:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:01:47,257 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 [2022-02-15 13:01:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:47,258 INFO L225 Difference]: With dead ends: 359 [2022-02-15 13:01:47,258 INFO L226 Difference]: Without dead ends: 329 [2022-02-15 13:01:47,258 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 [2022-02-15 13:01:47,259 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:01:47,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 72 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:01:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-15 13:01:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 246. [2022-02-15 13:01:47,263 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) [2022-02-15 13:01:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 543 transitions. [2022-02-15 13:01:47,264 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 543 transitions. Word has length 22 [2022-02-15 13:01:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:47,265 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 543 transitions. [2022-02-15 13:01:47,265 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) [2022-02-15 13:01:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 543 transitions. [2022-02-15 13:01:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:01:47,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:47,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:47,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-15 13:01:47,479 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 [2022-02-15 13:01:47,479 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1673184418, now seen corresponding path program 33 times [2022-02-15 13:01:47,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:47,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863422333] [2022-02-15 13:01:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:47,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:01:47,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:47,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863422333] [2022-02-15 13:01:47,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863422333] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:47,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214436353] [2022-02-15 13:01:47,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:01:47,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:47,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:47,523 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) [2022-02-15 13:01:47,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:01:47,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:47,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:47,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:47,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-15 13:01:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-15 13:01:47,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-15 13:01:47,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214436353] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:47,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:47,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-02-15 13:01:47,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611471250] [2022-02-15 13:01:47,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:47,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:01:47,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:47,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:01:47,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:01:47,759 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) [2022-02-15 13:01:48,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:48,186 INFO L93 Difference]: Finished difference Result 471 states and 971 transitions. [2022-02-15 13:01:48,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:01:48,187 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 [2022-02-15 13:01:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:48,188 INFO L225 Difference]: With dead ends: 471 [2022-02-15 13:01:48,188 INFO L226 Difference]: Without dead ends: 426 [2022-02-15 13:01:48,188 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 [2022-02-15 13:01:48,189 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 [2022-02-15 13:01:48,189 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] [2022-02-15 13:01:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-02-15 13:01:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 290. [2022-02-15 13:01:48,193 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) [2022-02-15 13:01:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 618 transitions. [2022-02-15 13:01:48,194 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 618 transitions. Word has length 22 [2022-02-15 13:01:48,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:48,194 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 618 transitions. [2022-02-15 13:01:48,194 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) [2022-02-15 13:01:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 618 transitions. [2022-02-15 13:01:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:01:48,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:48,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:48,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:48,410 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 [2022-02-15 13:01:48,411 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:48,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:48,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1350863530, now seen corresponding path program 34 times [2022-02-15 13:01:48,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:48,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239298043] [2022-02-15 13:01:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:48,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:01:48,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:48,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239298043] [2022-02-15 13:01:48,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239298043] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:48,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055953610] [2022-02-15 13:01:48,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:01:48,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:48,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:48,452 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) [2022-02-15 13:01:48,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-15 13:01:48,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:01:48,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:48,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:01:48,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:01:48,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:01:48,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055953610] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:48,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:48,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-15 13:01:48,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761954311] [2022-02-15 13:01:48,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:48,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:01:48,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:48,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:01:48,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:01:48,570 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) [2022-02-15 13:01:48,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:48,647 INFO L93 Difference]: Finished difference Result 426 states and 886 transitions. [2022-02-15 13:01:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 13:01:48,647 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 [2022-02-15 13:01:48,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:48,648 INFO L225 Difference]: With dead ends: 426 [2022-02-15 13:01:48,648 INFO L226 Difference]: Without dead ends: 417 [2022-02-15 13:01:48,649 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 [2022-02-15 13:01:48,649 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 [2022-02-15 13:01:48,649 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] [2022-02-15 13:01:48,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-02-15 13:01:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 357. [2022-02-15 13:01:48,654 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) [2022-02-15 13:01:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 776 transitions. [2022-02-15 13:01:48,654 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 776 transitions. Word has length 22 [2022-02-15 13:01:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:48,654 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 776 transitions. [2022-02-15 13:01:48,655 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) [2022-02-15 13:01:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 776 transitions. [2022-02-15 13:01:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:01:48,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:48,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:48,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:48,871 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 [2022-02-15 13:01:48,871 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:48,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1881476522, now seen corresponding path program 35 times [2022-02-15 13:01:48,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:48,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476294522] [2022-02-15 13:01:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:48,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:01:48,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:48,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476294522] [2022-02-15 13:01:48,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476294522] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:48,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532144750] [2022-02-15 13:01:48,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:01:48,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:48,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:48,913 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) [2022-02-15 13:01:48,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-15 13:01:48,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:01:48,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:48,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:01:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:01:48,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:01:49,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532144750] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:49,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:49,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-15 13:01:49,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919711893] [2022-02-15 13:01:49,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:49,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:01:49,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:01:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:01:49,056 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) [2022-02-15 13:01:49,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:49,142 INFO L93 Difference]: Finished difference Result 477 states and 1004 transitions. [2022-02-15 13:01:49,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 13:01:49,142 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 [2022-02-15 13:01:49,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:49,143 INFO L225 Difference]: With dead ends: 477 [2022-02-15 13:01:49,143 INFO L226 Difference]: Without dead ends: 468 [2022-02-15 13:01:49,144 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 [2022-02-15 13:01:49,144 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 [2022-02-15 13:01:49,144 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] [2022-02-15 13:01:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-02-15 13:01:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 408. [2022-02-15 13:01:49,149 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) [2022-02-15 13:01:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 894 transitions. [2022-02-15 13:01:49,149 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 894 transitions. Word has length 22 [2022-02-15 13:01:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:49,149 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 894 transitions. [2022-02-15 13:01:49,149 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) [2022-02-15 13:01:49,150 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 894 transitions. [2022-02-15 13:01:49,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:01:49,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:49,150 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:49,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:49,363 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 [2022-02-15 13:01:49,363 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:49,364 INFO L85 PathProgramCache]: Analyzing trace with hash -570097848, now seen corresponding path program 36 times [2022-02-15 13:01:49,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:49,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336262191] [2022-02-15 13:01:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:49,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:49,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:49,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336262191] [2022-02-15 13:01:49,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336262191] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:49,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169486099] [2022-02-15 13:01:49,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:01:49,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:49,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:49,404 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) [2022-02-15 13:01:49,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-15 13:01:49,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:01:49,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:49,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:01:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:49,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:49,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169486099] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:49,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:49,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-15 13:01:49,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522272400] [2022-02-15 13:01:49,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:49,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:01:49,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:49,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:01:49,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:01:49,526 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) [2022-02-15 13:01:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:49,684 INFO L93 Difference]: Finished difference Result 512 states and 1072 transitions. [2022-02-15 13:01:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:01:49,684 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 [2022-02-15 13:01:49,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:49,686 INFO L225 Difference]: With dead ends: 512 [2022-02-15 13:01:49,686 INFO L226 Difference]: Without dead ends: 512 [2022-02-15 13:01:49,686 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 [2022-02-15 13:01:49,687 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 [2022-02-15 13:01:49,688 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] [2022-02-15 13:01:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-02-15 13:01:49,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 402. [2022-02-15 13:01:49,694 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) [2022-02-15 13:01:49,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 882 transitions. [2022-02-15 13:01:49,695 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 882 transitions. Word has length 24 [2022-02-15 13:01:49,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:49,695 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 882 transitions. [2022-02-15 13:01:49,695 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) [2022-02-15 13:01:49,695 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 882 transitions. [2022-02-15 13:01:49,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:01:49,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:49,696 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:49,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:49,911 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 [2022-02-15 13:01:49,912 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:49,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1395949260, now seen corresponding path program 37 times [2022-02-15 13:01:49,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:49,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009765116] [2022-02-15 13:01:49,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:49,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:49,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:49,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009765116] [2022-02-15 13:01:49,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009765116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:49,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213699475] [2022-02-15 13:01:49,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:01:49,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:49,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:49,945 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) [2022-02-15 13:01:49,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-15 13:01:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:49,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:01:49,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:50,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:50,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213699475] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:50,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:50,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-15 13:01:50,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350330820] [2022-02-15 13:01:50,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:50,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:01:50,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:50,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:01:50,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:01:50,046 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) [2022-02-15 13:01:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:50,115 INFO L93 Difference]: Finished difference Result 418 states and 902 transitions. [2022-02-15 13:01:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:01:50,115 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 [2022-02-15 13:01:50,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:50,116 INFO L225 Difference]: With dead ends: 418 [2022-02-15 13:01:50,117 INFO L226 Difference]: Without dead ends: 415 [2022-02-15 13:01:50,117 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 [2022-02-15 13:01:50,117 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:01:50,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 19 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:01:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-02-15 13:01:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 402. [2022-02-15 13:01:50,122 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) [2022-02-15 13:01:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 881 transitions. [2022-02-15 13:01:50,122 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 881 transitions. Word has length 24 [2022-02-15 13:01:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:50,123 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 881 transitions. [2022-02-15 13:01:50,123 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) [2022-02-15 13:01:50,123 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 881 transitions. [2022-02-15 13:01:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:01:50,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:50,124 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:50,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:50,340 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 [2022-02-15 13:01:50,340 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1328082766, now seen corresponding path program 38 times [2022-02-15 13:01:50,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:50,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020843648] [2022-02-15 13:01:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:50,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:50,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:50,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020843648] [2022-02-15 13:01:50,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020843648] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:50,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928300666] [2022-02-15 13:01:50,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:01:50,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:50,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:50,373 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) [2022-02-15 13:01:50,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-15 13:01:50,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:01:50,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:01:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:50,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:50,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928300666] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:50,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:50,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-02-15 13:01:50,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653564516] [2022-02-15 13:01:50,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:50,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:01:50,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:50,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:01:50,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:01:50,476 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) [2022-02-15 13:01:50,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:50,581 INFO L93 Difference]: Finished difference Result 588 states and 1220 transitions. [2022-02-15 13:01:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:01:50,581 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 [2022-02-15 13:01:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:50,583 INFO L225 Difference]: With dead ends: 588 [2022-02-15 13:01:50,583 INFO L226 Difference]: Without dead ends: 588 [2022-02-15 13:01:50,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:01:50,584 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 [2022-02-15 13:01:50,584 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] [2022-02-15 13:01:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-02-15 13:01:50,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 360. [2022-02-15 13:01:50,588 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) [2022-02-15 13:01:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 776 transitions. [2022-02-15 13:01:50,589 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 776 transitions. Word has length 24 [2022-02-15 13:01:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:50,589 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 776 transitions. [2022-02-15 13:01:50,589 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) [2022-02-15 13:01:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 776 transitions. [2022-02-15 13:01:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:01:50,590 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:50,590 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:50,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:50,796 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 [2022-02-15 13:01:50,797 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1286137202, now seen corresponding path program 39 times [2022-02-15 13:01:50,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:50,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864441228] [2022-02-15 13:01:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:50,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:50,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:50,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864441228] [2022-02-15 13:01:50,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864441228] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:50,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268196530] [2022-02-15 13:01:50,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:01:50,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:50,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:50,834 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) [2022-02-15 13:01:50,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-15 13:01:50,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-15 13:01:50,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:50,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:50,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-15 13:01:50,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-15 13:01:50,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268196530] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:01:50,939 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-15 13:01:50,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2022-02-15 13:01:50,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289659539] [2022-02-15 13:01:50,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:01:50,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:01:50,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:50,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:01:50,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:01:50,940 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) [2022-02-15 13:01:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:50,988 INFO L93 Difference]: Finished difference Result 437 states and 916 transitions. [2022-02-15 13:01:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:01:50,988 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 [2022-02-15 13:01:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:50,989 INFO L225 Difference]: With dead ends: 437 [2022-02-15 13:01:50,989 INFO L226 Difference]: Without dead ends: 329 [2022-02-15 13:01:50,990 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 [2022-02-15 13:01:50,990 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 [2022-02-15 13:01:50,990 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] [2022-02-15 13:01:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-15 13:01:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 291. [2022-02-15 13:01:50,993 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) [2022-02-15 13:01:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 607 transitions. [2022-02-15 13:01:50,994 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 607 transitions. Word has length 24 [2022-02-15 13:01:50,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:50,994 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 607 transitions. [2022-02-15 13:01:50,994 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) [2022-02-15 13:01:50,994 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 607 transitions. [2022-02-15 13:01:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:01:50,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:50,995 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:51,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:51,211 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 [2022-02-15 13:01:51,211 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:51,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:51,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1776796524, now seen corresponding path program 40 times [2022-02-15 13:01:51,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:51,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786377433] [2022-02-15 13:01:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:51,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:01:51,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:51,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786377433] [2022-02-15 13:01:51,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786377433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:51,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454141111] [2022-02-15 13:01:51,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:01:51,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:51,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:51,242 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) [2022-02-15 13:01:51,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-15 13:01:51,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:01:51,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:51,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:01:51,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:51,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:51,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454141111] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:51,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:51,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-15 13:01:51,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134380306] [2022-02-15 13:01:51,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:51,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:01:51,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:51,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:01:51,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:01:51,334 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) [2022-02-15 13:01:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:51,425 INFO L93 Difference]: Finished difference Result 391 states and 780 transitions. [2022-02-15 13:01:51,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:01:51,425 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 [2022-02-15 13:01:51,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:51,426 INFO L225 Difference]: With dead ends: 391 [2022-02-15 13:01:51,427 INFO L226 Difference]: Without dead ends: 391 [2022-02-15 13:01:51,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:01:51,427 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 [2022-02-15 13:01:51,427 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] [2022-02-15 13:01:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-02-15 13:01:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 283. [2022-02-15 13:01:51,430 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) [2022-02-15 13:01:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 589 transitions. [2022-02-15 13:01:51,431 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 589 transitions. Word has length 24 [2022-02-15 13:01:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:51,431 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 589 transitions. [2022-02-15 13:01:51,431 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) [2022-02-15 13:01:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 589 transitions. [2022-02-15 13:01:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:01:51,432 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:51,432 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:51,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:51,647 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 [2022-02-15 13:01:51,647 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:51,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2035373036, now seen corresponding path program 41 times [2022-02-15 13:01:51,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:51,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147563204] [2022-02-15 13:01:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:51,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:51,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:51,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147563204] [2022-02-15 13:01:51,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147563204] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:51,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424813568] [2022-02-15 13:01:51,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:01:51,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:51,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:51,681 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) [2022-02-15 13:01:51,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-15 13:01:51,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:01:51,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:01:51,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:51,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:51,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424813568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:51,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:51,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-15 13:01:51,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641375303] [2022-02-15 13:01:51,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:51,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:01:51,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:51,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:01:51,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:01:51,782 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) [2022-02-15 13:01:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:51,860 INFO L93 Difference]: Finished difference Result 374 states and 754 transitions. [2022-02-15 13:01:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:01:51,861 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 [2022-02-15 13:01:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:51,862 INFO L225 Difference]: With dead ends: 374 [2022-02-15 13:01:51,862 INFO L226 Difference]: Without dead ends: 371 [2022-02-15 13:01:51,862 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 [2022-02-15 13:01:51,862 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 [2022-02-15 13:01:51,862 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] [2022-02-15 13:01:51,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-02-15 13:01:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 306. [2022-02-15 13:01:51,866 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) [2022-02-15 13:01:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 642 transitions. [2022-02-15 13:01:51,866 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 642 transitions. Word has length 24 [2022-02-15 13:01:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:51,866 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 642 transitions. [2022-02-15 13:01:51,866 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) [2022-02-15 13:01:51,866 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 642 transitions. [2022-02-15 13:01:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:01:51,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:01:51,867 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:01:51,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:52,082 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 [2022-02-15 13:01:52,083 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:01:52,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:01:52,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1186508880, now seen corresponding path program 42 times [2022-02-15 13:01:52,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:01:52,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134621287] [2022-02-15 13:01:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:01:52,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:01:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:01:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:01:52,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:01:52,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134621287] [2022-02-15 13:01:52,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134621287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:01:52,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831602903] [2022-02-15 13:01:52,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:01:52,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:01:52,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:01:52,123 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) [2022-02-15 13:01:52,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-15 13:01:52,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:01:52,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:01:52,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:01:52,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:01:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-15 13:01:52,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:01:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-15 13:01:52,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831602903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:01:52,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:01:52,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-02-15 13:01:52,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153490532] [2022-02-15 13:01:52,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:01:52,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:01:52,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:01:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:01:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:01:52,350 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) [2022-02-15 13:01:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:01:52,597 INFO L93 Difference]: Finished difference Result 319 states and 664 transitions. [2022-02-15 13:01:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:01:52,597 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 [2022-02-15 13:01:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:01:52,597 INFO L225 Difference]: With dead ends: 319 [2022-02-15 13:01:52,598 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 13:01:52,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:01:52,598 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 [2022-02-15 13:01:52,598 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] [2022-02-15 13:01:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 13:01:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 13:01:52,599 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) [2022-02-15 13:01:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 13:01:52,599 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2022-02-15 13:01:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:01:52,599 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 13:01:52,599 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) [2022-02-15 13:01:52,599 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 13:01:52,599 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 13:01:52,601 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-15 13:01:52,601 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-15 13:01:52,602 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-15 13:01:52,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-15 13:01:52,803 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 [2022-02-15 13:01:52,806 INFO L732 BasicCegarLoop]: Path program histogram: [42, 2, 1, 1] [2022-02-15 13:01:52,807 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-15 13:01:52,807 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 13:01:52,809 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 01:01:52 BasicIcfg [2022-02-15 13:01:52,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 13:01:52,809 INFO L158 Benchmark]: Toolchain (without parser) took 21082.21ms. Allocated memory was 192.9MB in the beginning and 362.8MB in the end (delta: 169.9MB). Free memory was 153.2MB in the beginning and 293.8MB in the end (delta: -140.7MB). Peak memory consumption was 30.1MB. Max. memory is 8.0GB. [2022-02-15 13:01:52,809 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 192.9MB. Free memory is still 154.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 13:01:52,809 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.31ms. Allocated memory is still 192.9MB. Free memory was 153.0MB in the beginning and 151.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 13:01:52,809 INFO L158 Benchmark]: Boogie Preprocessor took 9.84ms. Allocated memory is still 192.9MB. Free memory was 151.5MB in the beginning and 150.6MB in the end (delta: 884.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 13:01:52,810 INFO L158 Benchmark]: RCFGBuilder took 169.54ms. Allocated memory is still 192.9MB. Free memory was 150.5MB in the beginning and 142.2MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-02-15 13:01:52,810 INFO L158 Benchmark]: TraceAbstraction took 20877.44ms. Allocated memory was 192.9MB in the beginning and 362.8MB in the end (delta: 169.9MB). Free memory was 141.7MB in the beginning and 293.8MB in the end (delta: -152.1MB). Peak memory consumption was 18.5MB. Max. memory is 8.0GB. [2022-02-15 13:01:52,810 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 192.9MB. Free memory is still 154.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.31ms. Allocated memory is still 192.9MB. Free memory was 153.0MB in the beginning and 151.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.84ms. Allocated memory is still 192.9MB. Free memory was 151.5MB in the beginning and 150.6MB in the end (delta: 884.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 169.54ms. Allocated memory is still 192.9MB. Free memory was 150.5MB in the beginning and 142.2MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 20877.44ms. Allocated memory was 192.9MB in the beginning and 362.8MB in the end (delta: 169.9MB). Free memory was 141.7MB in the beginning and 293.8MB in the end (delta: -152.1MB). Peak memory consumption was 18.5MB. 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: 20.8s, OverallIterations: 46, TraceHistogramMax: 4, PathProgramHistogramMax: 42, EmptinessCheckTime: 0.0s, AutomataDifference: 4.8s, 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, 2.4s 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, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2034 GetRequests, 1456 SyntacticMatches, 117 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 2.5s 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, 5.4s 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! [2022-02-15 13:01:52,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...